631124102122139 has 4 divisors (see below), whose sum is σ = 631686100433256. Its totient is φ = 630562103811024.

The previous prime is 631124102122121. The next prime is 631124102122141. The reversal of 631124102122139 is 931221201421136.

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 631124102122139 - 2⁸ = 631124102121883 is a prime.

It is a super-2 number, since 2×631124102122139² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631124102122439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280999153874 + ... + 280999156119.

It is an arithmetic number, because the mean of its divisors is an integer number (157921525108314).

Almost surely, 2^{631124102122139} is an apocalyptic number.

631124102122139 is a deficient number, since it is larger than the sum of its proper divisors (561998311117).

631124102122139 is a wasteful number, since it uses less digits than its factorization.

631124102122139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561998311116.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 631124102122139 in words is "six hundred thirty-one trillion, one hundred twenty-four billion, one hundred two million, one hundred twenty-two thousand, one hundred thirty-nine".