21113014312 has 32 divisors (see below), whose sum is σ = 44485620480. Its totient is φ = 9320794560.

The previous prime is 21113014309. The next prime is 21113014313. The reversal of 21113014312 is 21341031112.

It is a self number, because there is not a number n which added to its sum of digits gives 21113014312.

It is not an unprimeable number, because it can be changed into a prime (21113014313) 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, 4410864 + ... + 4415647.

It is an arithmetic number, because the mean of its divisors is an integer number (1390175640).

Almost surely, 2^21113014312 is an apocalyptic number.

It is an amenable number.

21113014312 is an abundant number, since it is smaller than the sum of its proper divisors (23372606168).

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

21113014312 is a wasteful number, since it uses less digits than its factorization.

21113014312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8826553 (or 8826549 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21113014312 its reverse (21341031112), we get a palindrome (42454045424).

The spelling of 21113014312 in words is "twenty-one billion, one hundred thirteen million, fourteen thousand, three hundred twelve".