22102021002121 has 4 divisors (see below), whose sum is σ = 22261028347600. Its totient is φ = 21943013656644.

The previous prime is 22102021002107. The next prime is 22102021002137. The reversal of 22102021002121 is 12120012020122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22102021002121 - 2²¹ = 22102018904969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22102021002095 and 22102021002104.

It is not an unprimeable number, because it can be changed into a prime (22102021002101) 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, 79503672531 + ... + 79503672808.

It is an arithmetic number, because the mean of its divisors is an integer number (5565257086900).

Almost surely, 2^{22102021002121} is an apocalyptic number.

It is an amenable number.

22102021002121 is a deficient number, since it is larger than the sum of its proper divisors (159007345479).

22102021002121 is a wasteful number, since it uses less digits than its factorization.

22102021002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159007345478.

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

Adding to 22102021002121 its reverse (12120012020122), we get a palindrome (34222033022243).

The spelling of 22102021002121 in words is "twenty-two trillion, one hundred two billion, twenty-one million, two thousand, one hundred twenty-one".