21002112110200 has 48 divisors (see below), whose sum is σ = 52586057636280. Its totient is φ = 7754626008960.

The previous prime is 21002112110183. The next prime is 21002112110201. The reversal of 21002112110200 is 201121120012.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002112110201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4038865114 + ... + 4038870313.

Almost surely, 2^{21002112110200} is an apocalyptic number.

21002112110200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002112110200 is an abundant number, since it is smaller than the sum of its proper divisors (31583945526080).

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

21002112110200 is a wasteful number, since it uses less digits than its factorization.

21002112110200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8077735456 (or 8077735447 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21002112110200 its reverse (201121120012), we get a palindrome (21203233230212).

The spelling of 21002112110200 in words is "twenty-one trillion, two billion, one hundred twelve million, one hundred ten thousand, two hundred".