21031113102000 has 80 divisors (see below), whose sum is σ = 67804308660192. Its totient is φ = 5608296825600.

The previous prime is 21031113101987. The next prime is 21031113102019. The reversal of 21031113102000 is 20131113012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 1752586759 + ... + 1752598758.

Almost surely, 2^{21031113102000} is an apocalyptic number.

21031113102000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21031113102000 is an abundant number, since it is smaller than the sum of its proper divisors (46773195558192).

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

21031113102000 is a wasteful number, since it uses less digits than its factorization.

21031113102000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3505185543 (or 3505185527 counting only the distinct ones).

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

Adding to 21031113102000 its reverse (20131113012), we get a palindrome (21051244215012).

The spelling of 21031113102000 in words is "twenty-one trillion, thirty-one billion, one hundred thirteen million, one hundred two thousand".