120771631 has 4 divisors (see below), whose sum is σ = 124936200. Its totient is φ = 116607064.

The previous prime is 120771613. The next prime is 120771641. The reversal of 120771631 is 136177021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120771631 - 2¹⁹ = 120247343 is a prime.

It is a super-2 number, since 2×120771631² = 29171573708800322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120771631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120771601) 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, 2082241 + ... + 2082298.

It is an arithmetic number, because the mean of its divisors is an integer number (31234050).

Almost surely, 2^120771631 is an apocalyptic number.

120771631 is a deficient number, since it is larger than the sum of its proper divisors (4164569).

120771631 is an equidigital number, since it uses as much as digits as its factorization.

120771631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4164568.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 120771631 is about 10989.6146884229. The cubic root of 120771631 is about 494.2973822322.

The spelling of 120771631 in words is "one hundred twenty million, seven hundred seventy-one thousand, six hundred thirty-one".