12221020201021 has 4 divisors (see below), whose sum is σ = 12221081671932. Its totient is φ = 12220958730112.

The previous prime is 12221020201001. The next prime is 12221020201043. The reversal of 12221020201021 is 12010202012221.

It is a happy number.

12221020201021 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 can be written as a sum of positive squares in 2 ways, for example, as 7966449800100 + 4254570400921 = 2822490^2 + 2062661^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221020201021 - 2²⁹ = 12220483330109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221020200986 and 12221020201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221020201001) 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, 30436270 + ... + 30835183.

It is an arithmetic number, because the mean of its divisors is an integer number (3055270417983).

Almost surely, 2^{12221020201021} is an apocalyptic number.

It is an amenable number.

12221020201021 is a deficient number, since it is larger than the sum of its proper divisors (61470911).

12221020201021 is an equidigital number, since it uses as much as digits as its factorization.

12221020201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61470910.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12221020201021 its reverse (12010202012221), we get a palindrome (24231222213242).

The spelling of 12221020201021 in words is "twelve trillion, two hundred twenty-one billion, twenty million, two hundred one thousand, twenty-one".