31540115121 has 32 divisors (see below), whose sum is σ = 45086576640. Its totient is φ = 19554260544.

The previous prime is 31540115111. The next prime is 31540115149. The reversal of 31540115121 is 12151104513.

It is not a de Polignac number, because 31540115121 - 2⁷ = 31540114993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31540115091 and 31540115100.

It is not an unprimeable number, because it can be changed into a prime (31540115111) 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, 721536 + ... + 763998.

It is an arithmetic number, because the mean of its divisors is an integer number (1408955520).

Almost surely, 2^31540115121 is an apocalyptic number.

It is an amenable number.

31540115121 is a deficient number, since it is larger than the sum of its proper divisors (13546461519).

31540115121 is a wasteful number, since it uses less digits than its factorization.

31540115121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42725.

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 31540115121 its reverse (12151104513), we get a palindrome (43691219634).

The spelling of 31540115121 in words is "thirty-one billion, five hundred forty million, one hundred fifteen thousand, one hundred twenty-one".