22122210121 has 4 divisors (see below), whose sum is σ = 24133320144. Its totient is φ = 20111100100.

The previous prime is 22122210107. The next prime is 22122210133. The reversal of 22122210121 is 12101222122.

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 a de Polignac number, because none of the positive numbers 2^k-22122210121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22122210095 and 22122210104.

It is not an unprimeable number, because it can be changed into a prime (22122210191) 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, 1005554995 + ... + 1005555016.

It is an arithmetic number, because the mean of its divisors is an integer number (6033330036).

Almost surely, 2^22122210121 is an apocalyptic number.

It is an amenable number.

22122210121 is a deficient number, since it is larger than the sum of its proper divisors (2011110023).

22122210121 is a wasteful number, since it uses less digits than its factorization.

22122210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011110022.

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

Adding to 22122210121 its reverse (12101222122), we get a palindrome (34223432243).

It can be divided in two parts, 221222101 and 21, that added together give a palindrome (221222122).

The spelling of 22122210121 in words is "twenty-two billion, one hundred twenty-two million, two hundred ten thousand, one hundred twenty-one".