120665000631 has 32 divisors (see below), whose sum is σ = 186284275200. Its totient is φ = 68052157056.

The previous prime is 120665000627. The next prime is 120665000647. The reversal of 120665000631 is 136000566021.

120665000631 is a nontrivial binomial coefficient, being equal to C(491254, 2).

It is not a de Polignac number, because 120665000631 - 2² = 120665000627 is a prime.

It is a super-2 number, since 2×120665000631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120665000611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 368440 + ... + 614066.

It is an arithmetic number, because the mean of its divisors is an integer number (5821383600).

Almost surely, 2^120665000631 is an apocalyptic number.

120665000631 is the 491253-rd triangular number and also the 245627-th hexagonal number.

120665000631 is a deficient number, since it is larger than the sum of its proper divisors (65619274569).

120665000631 is a wasteful number, since it uses less digits than its factorization.

120665000631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245943.

The product of its (nonzero) digits is 6480, while the sum is 30.

Adding to 120665000631 its reverse (136000566021), we get a palindrome (256665566652).

The spelling of 120665000631 in words is "one hundred twenty billion, six hundred sixty-five million, six hundred thirty-one", and thus it is an aban number.