12220010111021 has 4 divisors (see below), whose sum is σ = 12220265823612. Its totient is φ = 12219754398432.

The previous prime is 12220010111011. The next prime is 12220010111123. The reversal of 12220010111021 is 12011101002221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2160576612100 + 10059433498921 = 1469890^2 + 3171661^2 .

It is a cyclic number.

It is not a de Polignac number, because 12220010111021 - 2³⁴ = 12202830241837 is a prime.

It is a super-2 number, since 2×12220010111021² (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 = 12220010110987 and 12220010111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220010111011) 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, 127784600 + ... + 127880193.

It is an arithmetic number, because the mean of its divisors is an integer number (3055066455903).

Almost surely, 2^{12220010111021} is an apocalyptic number.

It is an amenable number.

12220010111021 is a deficient number, since it is larger than the sum of its proper divisors (255712591).

12220010111021 is an equidigital number, since it uses as much as digits as its factorization.

12220010111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255712590.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12220010111021 its reverse (12011101002221), we get a palindrome (24231111113242).

The spelling of 12220010111021 in words is "twelve trillion, two hundred twenty billion, ten million, one hundred eleven thousand, twenty-one".