120863721087 has 6 divisors (see below), whose sum is σ = 174580930472. Its totient is φ = 80575814052.

The previous prime is 120863721079. The next prime is 120863721091. The reversal of 120863721087 is 780127368021.

120863721087 is a `hidden beast` number, since 1 + 2 + 0 + 8 + 637 + 2 + 1 + 0 + 8 + 7 = 666.

It is not a de Polignac number, because 120863721087 - 2³ = 120863721079 is a prime.

It is a super-2 number, since 2×120863721087² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120863721487) 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, 6714651163 + ... + 6714651180.

Almost surely, 2^120863721087 is an apocalyptic number.

120863721087 is a deficient number, since it is larger than the sum of its proper divisors (53717209385).

120863721087 is a wasteful number, since it uses less digits than its factorization.

120863721087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13429302349 (or 13429302346 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 120863721087 in words is "one hundred twenty billion, eight hundred sixty-three million, seven hundred twenty-one thousand, eighty-seven".