112001010021 has 6 divisors (see below), whose sum is σ = 161779236710. Its totient is φ = 74667340008.

The previous prime is 112001010007. The next prime is 112001010029. The reversal of 112001010021 is 120010100211.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 98687081025 + 13313928996 = 314145^2 + 115386^2 .

It is not a de Polignac number, because 112001010021 - 2¹⁰ = 112001008997 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: 12444556669 = 112001010021 / (1 + 1 + 2 + 0 + 0 + 1 + 0 + 1 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112001009985 and 112001010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112001010029) 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 5 ways as a sum of consecutive naturals, for example, 6222278326 + ... + 6222278343.

Almost surely, 2^112001010021 is an apocalyptic number.

It is an amenable number.

112001010021 is a deficient number, since it is larger than the sum of its proper divisors (49778226689).

112001010021 is a wasteful number, since it uses less digits than its factorization.

112001010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12444556675 (or 12444556672 counting only the distinct ones).

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

Adding to 112001010021 its reverse (120010100211), we get a palindrome (232011110232).

The spelling of 112001010021 in words is "one hundred twelve billion, one million, ten thousand, twenty-one".