21110102212100 has 144 divisors (see below), whose sum is σ = 51592122892800. Its totient is φ = 7427808768000.

The previous prime is 21110102212093. The next prime is 21110102212139. The reversal of 21110102212100 is 121220101112.

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, 293530946 + ... + 293602854.

It is an arithmetic number, because the mean of its divisors is an integer number (358278631200).

Almost surely, 2^{21110102212100} is an apocalyptic number.

21110102212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21110102212100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25796061446400).

21110102212100 is an abundant number, since it is smaller than the sum of its proper divisors (30482020680700).

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

21110102212100 is a wasteful number, since it uses less digits than its factorization.

21110102212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80574 (or 80567 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21110102212100 its reverse (121220101112), we get a palindrome (21231322313212).

The spelling of 21110102212100 in words is "twenty-one trillion, one hundred ten billion, one hundred two million, two hundred twelve thousand, one hundred".