120531781077 has 12 divisors (see below), whose sum is σ = 166441828800. Its totient is φ = 77583673552.

The previous prime is 120531781063. The next prime is 120531781079. The reversal of 120531781077 is 770187135021.

It is not a de Polignac number, because 120531781077 - 2⁴ = 120531781061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120531781079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23884077 + ... + 23889122.

It is an arithmetic number, because the mean of its divisors is an integer number (13870152400).

Almost surely, 2^120531781077 is an apocalyptic number.

It is an amenable number.

120531781077 is a deficient number, since it is larger than the sum of its proper divisors (45910047723).

120531781077 is an equidigital number, since it uses as much as digits as its factorization.

120531781077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47773260 (or 47773231 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 42.

The spelling of 120531781077 in words is "one hundred twenty billion, five hundred thirty-one million, seven hundred eighty-one thousand, seventy-seven".