10120002156 has 36 divisors (see below), whose sum is σ = 27906673704. Its totient is φ = 3066667200.

The previous prime is 10120002083. The next prime is 10120002157. The reversal of 10120002156 is 65120002101.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (10120002157) 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 11 ways as a sum of consecutive naturals, for example, 12777385 + ... + 12778176.

Almost surely, 2^10120002156 is an apocalyptic number.

It is an amenable number.

10120002156 is an abundant number, since it is smaller than the sum of its proper divisors (17786671548).

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

10120002156 is a wasteful number, since it uses less digits than its factorization.

10120002156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25555582 (or 25555577 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 10120002156 its reverse (65120002101), we get a palindrome (75240004257).

Subtracting 10120002156 from its reverse (65120002101), we obtain a palindrome (54999999945).

The spelling of 10120002156 in words is "ten billion, one hundred twenty million, two thousand, one hundred fifty-six".