31212322031 has 8 divisors (see below), whose sum is σ = 36052735824. Its totient is φ = 26705729920.

The previous prime is 31212322019. The next prime is 31212322049. The reversal of 31212322031 is 13022321213.

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 31212322031 - 2¹⁸ = 31212059887 is a prime.

It is a super-2 number, since 2×31212322031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31212321994 and 31212322012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212322081) 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, 83455220 + ... + 83455593.

It is an arithmetic number, because the mean of its divisors is an integer number (4506591978).

Almost surely, 2^31212322031 is an apocalyptic number.

31212322031 is a deficient number, since it is larger than the sum of its proper divisors (4840413793).

31212322031 is a wasteful number, since it uses less digits than its factorization.

31212322031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166910841.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31212322031 its reverse (13022321213), we get a palindrome (44234643244).

The spelling of 31212322031 in words is "thirty-one billion, two hundred twelve million, three hundred twenty-two thousand, thirty-one".