21112023212 has 24 divisors (see below), whose sum is σ = 43206003456. Its totient is φ = 8837590608.

The previous prime is 21112023193. The next prime is 21112023221. The reversal of 21112023212 is 21232021112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8766248 + ... + 8768655.

It is an arithmetic number, because the mean of its divisors is an integer number (1800250144).

Almost surely, 2^21112023212 is an apocalyptic number.

It is an amenable number.

21112023212 is an abundant number, since it is smaller than the sum of its proper divisors (22093980244).

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

21112023212 is a wasteful number, since it uses less digits than its factorization.

21112023212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17534957 (or 17534955 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21112023212 its reverse (21232021112), we get a palindrome (42344044324).

The spelling of 21112023212 in words is "twenty-one billion, one hundred twelve million, twenty-three thousand, two hundred twelve".