21200102112112 has 120 divisors (see below), whose sum is σ = 51618906622976. Its totient is φ = 8256528720000.

The previous prime is 21200102112097. The next prime is 21200102112131. The reversal of 21200102112112 is 21121120100212.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 34264537 + ... + 34877767.

Almost surely, 2^{21200102112112} is an apocalyptic number.

21200102112112 is a gapful number since it is divisible by the number (22) 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 21200102112112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25809453311488).

21200102112112 is an abundant number, since it is smaller than the sum of its proper divisors (30418804510864).

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

21200102112112 is a wasteful number, since it uses less digits than its factorization.

21200102112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615819 (or 615802 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21200102112112 its reverse (21121120100212), we get a palindrome (42321222212324).

The spelling of 21200102112112 in words is "twenty-one trillion, two hundred billion, one hundred two million, one hundred twelve thousand, one hundred twelve".