31012332121 has 16 divisors (see below), whose sum is σ = 31578605568. Its totient is φ = 30452531200.

The previous prime is 31012332103. The next prime is 31012332137. The reversal of 31012332121 is 12123321013.

It is a cyclic number.

It is not a de Polignac number, because 31012332121 - 2⁷ = 31012331993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31012332101) 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, 5544036 + ... + 5549626.

It is an arithmetic number, because the mean of its divisors is an integer number (1973662848).

Almost surely, 2^31012332121 is an apocalyptic number.

It is an amenable number.

31012332121 is a deficient number, since it is larger than the sum of its proper divisors (566273447).

31012332121 is a wasteful number, since it uses less digits than its factorization.

31012332121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6152.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31012332121 its reverse (12123321013), we get a palindrome (43135653134).

The spelling of 31012332121 in words is "thirty-one billion, twelve million, three hundred thirty-two thousand, one hundred twenty-one".