31331000121 has 8 divisors (see below), whose sum is σ = 41836375104. Its totient is φ = 20856479280.

The previous prime is 31331000069. The next prime is 31331000147. The reversal of 31331000121 is 12100013313.

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

It is not a de Polignac number, because 31331000121 - 2¹⁹ = 31330475833 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31331000121.

It is not an unprimeable number, because it can be changed into a prime (31331000161) 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, 7711165 + ... + 7715226.

It is an arithmetic number, because the mean of its divisors is an integer number (5229546888).

Almost surely, 2^31331000121 is an apocalyptic number.

It is an amenable number.

31331000121 is a deficient number, since it is larger than the sum of its proper divisors (10505374983).

31331000121 is a wasteful number, since it uses less digits than its factorization.

31331000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15427071.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31331000121 its reverse (12100013313), we get a palindrome (43431013434).

The spelling of 31331000121 in words is "thirty-one billion, three hundred thirty-one million, one hundred twenty-one", and thus it is an aban number.