21311132310212 has 12 divisors (see below), whose sum is σ = 37303271221776. Its totient is φ = 10653054818280.

The previous prime is 21311132310211. The next prime is 21311132310319. The reversal of 21311132310212 is 21201323111312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21311132310211) 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, 627815114 + ... + 627849057.

It is an arithmetic number, because the mean of its divisors is an integer number (3108605935148).

Almost surely, 2^{21311132310212} is an apocalyptic number.

It is an amenable number.

21311132310212 is a deficient number, since it is larger than the sum of its proper divisors (15992138911564).

21311132310212 is a wasteful number, since it uses less digits than its factorization.

21311132310212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255668418 (or 1255668416 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21311132310212 its reverse (21201323111312), we get a palindrome (42512455421524).

The spelling of 21311132310212 in words is "twenty-one trillion, three hundred eleven billion, one hundred thirty-two million, three hundred ten thousand, two hundred twelve".