12221120011021 has 4 divisors (see below), whose sum is σ = 12940009423452. Its totient is φ = 11502230598592.

The previous prime is 12221120011003. The next prime is 12221120011039. The reversal of 12221120011021 is 12011002112221.

12221120011021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12221120011003) and next prime (12221120011039).

It can be written as a sum of positive squares in 2 ways, for example, as 8568763290025 + 3652356720996 = 2927245^2 + 1911114^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221120011021 - 2²³ = 12221111622413 is a prime.

It is a super-2 number, since 2×12221120011021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221120010986 and 12221120011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221120011721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359444706190 + ... + 359444706223.

It is an arithmetic number, because the mean of its divisors is an integer number (3235002355863).

Almost surely, 2^{12221120011021} is an apocalyptic number.

It is an amenable number.

12221120011021 is a deficient number, since it is larger than the sum of its proper divisors (718889412431).

12221120011021 is an equidigital number, since it uses as much as digits as its factorization.

12221120011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718889412430.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12221120011021 its reverse (12011002112221), we get a palindrome (24232122123242).

It can be divided in two parts, 122211200 and 11021, that added together give a palindrome (122222221).

The spelling of 12221120011021 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty million, eleven thousand, twenty-one".