10012120010020 has 24 divisors (see below), whose sum is σ = 21026252056824. Its totient is φ = 4004695616256.

The previous prime is 10012120009981. The next prime is 10012120010063. The reversal of 10012120010020 is 2001002121001.

It can be written as a sum of positive squares in 4 ways, for example, as 3225501057024 + 6786618952996 = 1795968^2 + 2605114^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10012120009979 and 10012120010006.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8984737 + ... + 10037416.

It is an arithmetic number, because the mean of its divisors is an integer number (876093835701).

Almost surely, 2^{10012120010020} is an apocalyptic number.

10012120010020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10012120010020 is an abundant number, since it is smaller than the sum of its proper divisors (11014132046804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10012120010020 is a wasteful number, since it uses less digits than its factorization.

10012120010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19048479 (or 19048477 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10012120010020 its reverse (2001002121001), we get a palindrome (12013122131021).

The spelling of 10012120010020 in words is "ten trillion, twelve billion, one hundred twenty million, ten thousand, twenty".