112001100021 has 6 divisors (see below), whose sum is σ = 161779366710. Its totient is φ = 74667400008.

The previous prime is 112001099981. The next prime is 112001100031. The reversal of 112001100021 is 120001100211.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 62165448900 + 49835651121 = 249330^2 + 223239^2 .

It is not a de Polignac number, because 112001100021 - 2²² = 111996905717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 12444566669 = 112001100021 / (1 + 1 + 2 + 0 + 0 + 1 + 1 + 0 + 0 + 0 + 2 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 112001099976 and 112001100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112001100031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6222283326 + ... + 6222283343.

It is an arithmetic number, because the mean of its divisors is an integer number (26963227785).

Almost surely, 2^112001100021 is an apocalyptic number.

It is an amenable number.

112001100021 is a deficient number, since it is larger than the sum of its proper divisors (49778266689).

112001100021 is a wasteful number, since it uses less digits than its factorization.

112001100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12444566675 (or 12444566672 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 112001100021 its reverse (120001100211), we get a palindrome (232002200232).

The spelling of 112001100021 in words is "one hundred twelve billion, one million, one hundred thousand, twenty-one".