31212300331 has 16 divisors (see below), whose sum is σ = 33504308640. Its totient is φ = 28986197760.

The previous prime is 31212300299. The next prime is 31212300337. The reversal of 31212300331 is 13300321213.

It is a cyclic number.

It is not a de Polignac number, because 31212300331 - 2⁵ = 31212300299 is a prime.

It is a super-2 number, since 2×31212300331² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31212300299 and 31212300308.

It is not an unprimeable number, because it can be changed into a prime (31212300337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1188361 + ... + 1214341.

It is an arithmetic number, because the mean of its divisors is an integer number (2094019290).

Almost surely, 2^31212300331 is an apocalyptic number.

31212300331 is a deficient number, since it is larger than the sum of its proper divisors (2292008309).

31212300331 is a wasteful number, since it uses less digits than its factorization.

31212300331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27246.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31212300331 its reverse (13300321213), we get a palindrome (44512621544).

The spelling of 31212300331 in words is "thirty-one billion, two hundred twelve million, three hundred thousand, three hundred thirty-one".