112002000021 has 40 divisors (see below), whose sum is σ = 172103922144. Its totient is φ = 72558802080.

The previous prime is 112002000017. The next prime is 112002000037. The reversal of 112002000021 is 120000200211.

It is not a de Polignac number, because 112002000021 - 2² = 112002000017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 112001999967 and 112002000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112002000421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 273550 + ... + 546656.

Almost surely, 2^112002000021 is an apocalyptic number.

It is an amenable number.

112002000021 is a deficient number, since it is larger than the sum of its proper divisors (60101922123).

112002000021 is an equidigital number, since it uses as much as digits as its factorization.

112002000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273263 (or 273254 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 112002000021 its reverse (120000200211), we get a palindrome (232002200232).

The spelling of 112002000021 in words is "one hundred twelve billion, two million, twenty-one", and thus it is an aban number.