31310332121 has 8 divisors (see below), whose sum is σ = 31625265984. Its totient is φ = 30995609040.

The previous prime is 31310332087. The next prime is 31310332129. The reversal of 31310332121 is 12123301313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31310332121 - 2¹⁸ = 31310069977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31310332093 and 31310332102.

It is not an unprimeable number, because it can be changed into a prime (31310332129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254855 + ... + 357171.

It is an arithmetic number, because the mean of its divisors is an integer number (3953158248).

Almost surely, 2^31310332121 is an apocalyptic number.

It is an amenable number.

31310332121 is a deficient number, since it is larger than the sum of its proper divisors (314933863).

31310332121 is a wasteful number, since it uses less digits than its factorization.

31310332121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105391.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31310332121 its reverse (12123301313), we get a palindrome (43433633434).

The spelling of 31310332121 in words is "thirty-one billion, three hundred ten million, three hundred thirty-two thousand, one hundred twenty-one".