22121330312 has 16 divisors (see below), whose sum is σ = 41479139340. Its totient is φ = 11060226496.

The previous prime is 22121330311. The next prime is 22121330347. The reversal of 22121330312 is 21303312122.

It can be written as a sum of positive squares in 2 ways, for example, as 21973318756 + 148011556 = 148234^2 + 12166^2 .

It is a super-2 number, since 2×22121330312² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22121330311) 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, 279158 + ... + 349530.

Almost surely, 2^22121330312 is an apocalyptic number.

It is an amenable number.

22121330312 is a deficient number, since it is larger than the sum of its proper divisors (19357809028).

22121330312 is a wasteful number, since it uses less digits than its factorization.

22121330312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109672 (or 109668 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 22121330312 its reverse (21303312122), we get a palindrome (43424642434).

The spelling of 22121330312 in words is "twenty-two billion, one hundred twenty-one million, three hundred thirty thousand, three hundred twelve".