21120012120200 has 48 divisors (see below), whose sum is σ = 56118889351680. Its totient is φ = 7241147012160.

The previous prime is 21120012120199. The next prime is 21120012120239. The reversal of 21120012120200 is 202121002112.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 7542860072 + ... + 7542862871.

It is an arithmetic number, because the mean of its divisors is an integer number (1169143528160).

Almost surely, 2^{21120012120200} is an apocalyptic number.

21120012120200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120012120200 is an abundant number, since it is smaller than the sum of its proper divisors (34998877231480).

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

21120012120200 is a wasteful number, since it uses less digits than its factorization.

21120012120200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15085722966 (or 15085722957 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21120012120200 its reverse (202121002112), we get a palindrome (21322133122312).

The spelling of 21120012120200 in words is "twenty-one trillion, one hundred twenty billion, twelve million, one hundred twenty thousand, two hundred".