120661012057 has 16 divisors (see below), whose sum is σ = 129906685440. Its totient is φ = 111803769792.

The previous prime is 120661012019. The next prime is 120661012061. The reversal of 120661012057 is 750210166021.

It is a cyclic number.

It is not a de Polignac number, because 120661012057 - 2¹⁵ = 120660979289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120661012657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 530178 + ... + 722779.

It is an arithmetic number, because the mean of its divisors is an integer number (8119167840).

Almost surely, 2^120661012057 is an apocalyptic number.

It is an amenable number.

120661012057 is a deficient number, since it is larger than the sum of its proper divisors (9245673383).

120661012057 is a wasteful number, since it uses less digits than its factorization.

120661012057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253112.

The product of its (nonzero) digits is 5040, while the sum is 31.

Adding to 120661012057 its reverse (750210166021), we get a palindrome (870871178078).

The spelling of 120661012057 in words is "one hundred twenty billion, six hundred sixty-one million, twelve thousand, fifty-seven".