22121321202312 has 16 divisors (see below), whose sum is σ = 55303303005840. Its totient is φ = 7373773734096.

The previous prime is 22121321202269. The next prime is 22121321202313. The reversal of 22121321202312 is 21320212312122.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 921721716763 = 22121321202312 / (2 + 2 + 1 + 2 + 1 + 3 + 2 + 1 + 2 + 0 + 2 + 3 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (22121321202313) 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, 460860858358 + ... + 460860858405.

It is an arithmetic number, because the mean of its divisors is an integer number (3456456437865).

Almost surely, 2^{22121321202312} is an apocalyptic number.

It is an amenable number.

22121321202312 is an abundant number, since it is smaller than the sum of its proper divisors (33181981803528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121321202312 is a wasteful number, since it uses less digits than its factorization.

22121321202312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921721716772 (or 921721716768 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 22121321202312 its reverse (21320212312122), we get a palindrome (43441533514434).

The spelling of 22121321202312 in words is "twenty-two trillion, one hundred twenty-one billion, three hundred twenty-one million, two hundred two thousand, three hundred twelve".