21110022011100 has 72 divisors (see below), whose sum is σ = 66630905849088. Its totient is φ = 5117581092800.

The previous prime is 21110022011051. The next prime is 21110022011147. The reversal of 21110022011100 is 111022001112.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3198484884 + ... + 3198491483.

It is an arithmetic number, because the mean of its divisors is an integer number (925429247904).

Almost surely, 2^{21110022011100} is an apocalyptic number.

21110022011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110022011100 is an abundant number, since it is smaller than the sum of its proper divisors (45520883837988).

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

21110022011100 is a wasteful number, since it uses less digits than its factorization.

21110022011100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6396976395 (or 6396976388 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21110022011100 its reverse (111022001112), we get a palindrome (21221044012212).

The spelling of 21110022011100 in words is "twenty-one trillion, one hundred ten billion, twenty-two million, eleven thousand, one hundred".