10120021988 has 12 divisors (see below), whose sum is σ = 18480040320. Its totient is φ = 4840010472.

The previous prime is 10120021981. The next prime is 10120022009. The reversal of 10120021988 is 88912002101.

10120021988 is a modest number, since divided by 21988 gives 1012 as remainder.

It is not an unprimeable number, because it can be changed into a prime (10120021981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55000028 + ... + 55000211.

It is an arithmetic number, because the mean of its divisors is an integer number (1540003360).

Almost surely, 2^10120021988 is an apocalyptic number.

It is an amenable number.

10120021988 is a deficient number, since it is larger than the sum of its proper divisors (8360018332).

10120021988 is a wasteful number, since it uses less digits than its factorization.

10120021988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110000266 (or 110000264 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 32.

The spelling of 10120021988 in words is "ten billion, one hundred twenty million, twenty-one thousand, nine hundred eighty-eight".