120978612187 has 4 divisors (see below), whose sum is σ = 124881148096. Its totient is φ = 117076076280.

The previous prime is 120978612173. The next prime is 120978612193. The reversal of 120978612187 is 781216879021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 781216879021 = 10663 ⋅73264267.

It is a cyclic number.

It is not a de Polignac number, because 120978612187 - 2⁷ = 120978612059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120978612127) 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, 1951267908 + ... + 1951267969.

It is an arithmetic number, because the mean of its divisors is an integer number (31220287024).

Almost surely, 2^120978612187 is an apocalyptic number.

120978612187 is a deficient number, since it is larger than the sum of its proper divisors (3902535909).

120978612187 is an equidigital number, since it uses as much as digits as its factorization.

120978612187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3902535908.

The product of its (nonzero) digits is 677376, while the sum is 52.

The spelling of 120978612187 in words is "one hundred twenty billion, nine hundred seventy-eight million, six hundred twelve thousand, one hundred eighty-seven".