21103212132200 has 48 divisors (see below), whose sum is σ = 53525419868160. Its totient is φ = 7673895320000.

The previous prime is 21103212132199. The next prime is 21103212132227. The reversal of 21103212132200 is 223121230112.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 4796182376 + ... + 4796186775.

It is an arithmetic number, because the mean of its divisors is an integer number (1115112913920).

Almost surely, 2^{21103212132200} is an apocalyptic number.

21103212132200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21103212132200 is an abundant number, since it is smaller than the sum of its proper divisors (32422207735960).

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

21103212132200 is a wasteful number, since it uses less digits than its factorization.

21103212132200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9592369178 (or 9592369169 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21103212132200 its reverse (223121230112), we get a palindrome (21326333362312).

The spelling of 21103212132200 in words is "twenty-one trillion, one hundred three billion, two hundred twelve million, one hundred thirty-two thousand, two hundred".