21232320212312 has 32 divisors (see below), whose sum is σ = 43877475245520. Its totient is φ = 9551559229440.

The previous prime is 21232320212303. The next prime is 21232320212339. The reversal of 21232320212312 is 21321202323212.

It is a super-2 number, since 2×21232320212312² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 1243684073 + ... + 1243701144.

Almost surely, 2^{21232320212312} is an apocalyptic number.

21232320212312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21232320212312 is an abundant number, since it is smaller than the sum of its proper divisors (22645155033208).

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

21232320212312 is a wasteful number, since it uses less digits than its factorization.

21232320212312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487385331 (or 2487385327 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21232320212312 its reverse (21321202323212), we get a palindrome (42553522535524).

The spelling of 21232320212312 in words is "twenty-one trillion, two hundred thirty-two billion, three hundred twenty million, two hundred twelve thousand, three hundred twelve".