112001000021 has 6 divisors (see below), whose sum is σ = 115996280322. Its totient is φ = 108138895760.

The previous prime is 112001000003. The next prime is 112001000071. The reversal of 112001000021 is 120000100211.

It can be written as a sum of positive squares in 3 ways, for example, as 12388803025 + 99612196996 = 111305^2 + 315614^2 .

It is not a de Polignac number, because 112001000021 - 2¹⁰ = 112000998997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112000999972 and 112001000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112001000071) 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, 66587150 + ... + 66588831.

It is an arithmetic number, because the mean of its divisors is an integer number (19332713387).

Almost surely, 2^112001000021 is an apocalyptic number.

It is an amenable number.

112001000021 is a deficient number, since it is larger than the sum of its proper divisors (3995280301).

112001000021 is an equidigital number, since it uses as much as digits as its factorization.

112001000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133176039 (or 133176010 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 112001000021 its reverse (120000100211), we get a palindrome (232001100232).

The spelling of 112001000021 in words is "one hundred twelve billion, one million, twenty-one", and thus it is an aban number.