120661857028 has 12 divisors (see below), whose sum is σ = 211235305932. Its totient is φ = 60308912480.

The previous prime is 120661856963. The next prime is 120661857059. The reversal of 120661857028 is 820758166021.

It can be written as a sum of positive squares in 2 ways, for example, as 65859983424 + 54801873604 = 256632^2 + 234098^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5491675 + ... + 5513602.

It is an arithmetic number, because the mean of its divisors is an integer number (17602942161).

Almost surely, 2^120661857028 is an apocalyptic number.

It is an amenable number.

120661857028 is a deficient number, since it is larger than the sum of its proper divisors (90573448904).

120661857028 is a wasteful number, since it uses less digits than its factorization.

120661857028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11008022 (or 11008020 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 120661857028 in words is "one hundred twenty billion, six hundred sixty-one million, eight hundred fifty-seven thousand, twenty-eight".