21900111110010 has 96 divisors (see below), whose sum is σ = 65106534654720. Its totient is φ = 5003284391424.

The previous prime is 21900111109913. The next prime is 21900111110023. The reversal of 21900111110010 is 1001111100912.

It is a super-2 number, since 2×21900111110010² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7239727 + ... + 9808866.

It is an arithmetic number, because the mean of its divisors is an integer number (678193069320).

Almost surely, 2^{21900111110010} is an apocalyptic number.

21900111110010 is an abundant number, since it is smaller than the sum of its proper divisors (43206423544710).

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

21900111110010 is a wasteful number, since it uses less digits than its factorization.

21900111110010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17050652 (or 17050649 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 18.

Adding to 21900111110010 its reverse (1001111100912), we get a palindrome (22901222210922).

The spelling of 21900111110010 in words is "twenty-one trillion, nine hundred billion, one hundred eleven million, one hundred ten thousand, ten".