21002113101012 has 12 divisors (see below), whose sum is σ = 49004930569056. Its totient is φ = 7000704367000.

The previous prime is 21002113101007. The next prime is 21002113101049. The reversal of 21002113101012 is 21010131120012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 21002113100982 and 21002113101000.

It is a congruent number.

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, 875088045864 + ... + 875088045887.

It is an arithmetic number, because the mean of its divisors is an integer number (4083744214088).

Almost surely, 2^{21002113101012} is an apocalyptic number.

It is an amenable number.

21002113101012 is an abundant number, since it is smaller than the sum of its proper divisors (28002817468044).

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

21002113101012 is a wasteful number, since it uses less digits than its factorization.

21002113101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750176091758 (or 1750176091756 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21002113101012 its reverse (21010131120012), we get a palindrome (42012244221024).

The spelling of 21002113101012 in words is "twenty-one trillion, two billion, one hundred thirteen million, one hundred one thousand, twelve".