22121002210121 has 16 divisors (see below), whose sum is σ = 22352113555200. Its totient is φ = 21890859120000.

The previous prime is 22121002210103. The next prime is 22121002210133. The reversal of 22121002210121 is 12101220012122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121002210121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22121002210121.

It is not an unprimeable number, because it can be changed into a prime (22121002210421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242060525 + ... + 242151893.

It is an arithmetic number, because the mean of its divisors is an integer number (1397007097200).

Almost surely, 2^{22121002210121} is an apocalyptic number.

It is an amenable number.

22121002210121 is a deficient number, since it is larger than the sum of its proper divisors (231111345079).

22121002210121 is a wasteful number, since it uses less digits than its factorization.

22121002210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96640.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22121002210121 its reverse (12101220012122), we get a palindrome (34222222222243).

The spelling of 22121002210121 in words is "twenty-two trillion, one hundred twenty-one billion, two million, two hundred ten thousand, one hundred twenty-one".