10112100000021 has 24 divisors (see below), whose sum is σ = 15669665400480. Its totient is φ = 6508937926512.

The previous prime is 10112100000007. The next prime is 10112100000053. The reversal of 10112100000021 is 12000000121101.

It is a happy number.

It is not a de Polignac number, because 10112100000021 - 2¹⁰ = 10112099998997 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 = 10112099999949 and 10112100000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10112100000721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 717468475 + ... + 717482568.

It is an arithmetic number, because the mean of its divisors is an integer number (652902725020).

Almost surely, 2^{10112100000021} is an apocalyptic number.

It is an amenable number.

10112100000021 is a deficient number, since it is larger than the sum of its proper divisors (5557565400459).

10112100000021 is an equidigital number, since it uses as much as digits as its factorization.

10112100000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434951087 (or 1434951075 counting only the distinct ones).

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

Adding to 10112100000021 its reverse (12000000121101), we get a palindrome (22112100121122).

The spelling of 10112100000021 in words is "ten trillion, one hundred twelve billion, one hundred million, twenty-one", and thus it is an aban number.