21023211031100 has 36 divisors (see below), whose sum is σ = 45621207154824. Its totient is φ = 8409129718080.

The previous prime is 21023211031079. The next prime is 21023211031127. The reversal of 21023211031100 is 113011232012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3608594 + ... + 7420806.

Almost surely, 2^{21023211031100} is an apocalyptic number.

21023211031100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21023211031100 is an abundant number, since it is smaller than the sum of its proper divisors (24597996123724).

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

21023211031100 is a wasteful number, since it uses less digits than its factorization.

21023211031100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867374 (or 3867367 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21023211031100 its reverse (113011232012), we get a palindrome (21136222263112).

The spelling of 21023211031100 in words is "twenty-one trillion, twenty-three billion, two hundred eleven million, thirty-one thousand, one hundred".