21001312013010 has 64 divisors (see below), whose sum is σ = 57985079537664. Its totient is φ = 4768509816000.

The previous prime is 21001312012931. The next prime is 21001312013063. The reversal of 21001312013010 is 1031021310012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 331114806 + ... + 331178225.

It is an arithmetic number, because the mean of its divisors is an integer number (906016867776).

Almost surely, 2^{21001312013010} is an apocalyptic number.

21001312013010 is an abundant number, since it is smaller than the sum of its proper divisors (36983767524654).

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

21001312013010 is a wasteful number, since it uses less digits than its factorization.

21001312013010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662293199.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21001312013010 its reverse (1031021310012), we get a palindrome (22032333323022).

The spelling of 21001312013010 in words is "twenty-one trillion, one billion, three hundred twelve million, thirteen thousand, ten".