21113110312 has 32 divisors (see below), whose sum is σ = 45248011200. Its totient is φ = 9047349504.

The previous prime is 21113110303. The next prime is 21113110313. The reversal of 21113110312 is 21301131112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21113110313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557863 + ... + 594505.

It is an arithmetic number, because the mean of its divisors is an integer number (1414000350).

Almost surely, 2^21113110312 is an apocalyptic number.

It is an amenable number.

21113110312 is an abundant number, since it is smaller than the sum of its proper divisors (24134900888).

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

21113110312 is a wasteful number, since it uses less digits than its factorization.

21113110312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46945 (or 46941 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21113110312 its reverse (21301131112), we get a palindrome (42414241424).

The spelling of 21113110312 in words is "twenty-one billion, one hundred thirteen million, one hundred ten thousand, three hundred twelve".