31040064121 has 16 divisors (see below), whose sum is σ = 35021242368. Its totient is φ = 27255603600.

The previous prime is 31040064101. The next prime is 31040064149. The reversal of 31040064121 is 12146004013.

It is a cyclic number.

It is not a de Polignac number, because 31040064121 - 2¹⁹ = 31039539833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31040064092 and 31040064101.

It is not an unprimeable number, because it can be changed into a prime (31040064101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91320 + ... + 265366.

It is an arithmetic number, because the mean of its divisors is an integer number (2188827648).

Almost surely, 2^31040064121 is an apocalyptic number.

31040064121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31040064121 is a deficient number, since it is larger than the sum of its proper divisors (3981178247).

31040064121 is a wasteful number, since it uses less digits than its factorization.

31040064121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174612.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31040064121 its reverse (12146004013), we get a palindrome (43186068134).

The spelling of 31040064121 in words is "thirty-one billion, forty million, sixty-four thousand, one hundred twenty-one".