21311123110312 has 16 divisors (see below), whose sum is σ = 45666692379360. Its totient is φ = 9133338475824.

The previous prime is 21311123110297. The next prime is 21311123110363. The reversal of 21311123110312 is 21301132111312.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190277884858 + ... + 190277884969.

It is an arithmetic number, because the mean of its divisors is an integer number (2854168273710).

Almost surely, 2^{21311123110312} is an apocalyptic number.

It is an amenable number.

21311123110312 is an abundant number, since it is smaller than the sum of its proper divisors (24355569269048).

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

21311123110312 is a wasteful number, since it uses less digits than its factorization.

21311123110312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380555769840 (or 380555769836 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 21311123110312 its reverse (21301132111312), we get a palindrome (42612255221624).

The spelling of 21311123110312 in words is "twenty-one trillion, three hundred eleven billion, one hundred twenty-three million, one hundred ten thousand, three hundred twelve".