103121631 has 6 divisors (see below), whose sum is σ = 148953480. Its totient is φ = 68747748.

The previous prime is 103121621. The next prime is 103121639. The reversal of 103121631 is 136121301.

103121631 is a `hidden beast` number, since 1 + 0 + 31 + 2 + 1 + 631 = 666.

It is not a de Polignac number, because 103121631 - 2⁶ = 103121567 is a prime.

It is a super-2 number, since 2×103121631² = 21268141560200322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103121639) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5728971 + ... + 5728988.

It is an arithmetic number, because the mean of its divisors is an integer number (24825580).

Almost surely, 2^103121631 is an apocalyptic number.

103121631 is a deficient number, since it is larger than the sum of its proper divisors (45831849).

103121631 is a wasteful number, since it uses less digits than its factorization.

103121631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11457965 (or 11457962 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 103121631 is about 10154.8821263469. The cubic root of 103121631 is about 468.9392571241.

Adding to 103121631 its reverse (136121301), we get a palindrome (239242932).

The spelling of 103121631 in words is "one hundred three million, one hundred twenty-one thousand, six hundred thirty-one".