31212023130331 has 2 divisors, whose sum is σ = 31212023130332. Its totient is φ = 31212023130330.

The previous prime is 31212023130311. The next prime is 31212023130373. The reversal of 31212023130331 is 13303132021213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31212023130331 - 2¹¹ = 31212023128283 is a prime.

It is a super-2 number, since 2×31212023130331² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31212023130296 and 31212023130305.

It is not a weakly prime, because it can be changed into another prime (31212023130311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606011565165 + 15606011565166.

It is an arithmetic number, because the mean of its divisors is an integer number (15606011565166).

Almost surely, 2^{31212023130331} is an apocalyptic number.

31212023130331 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212023130331 is an equidigital number, since it uses as much as digits as its factorization.

31212023130331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31212023130331 its reverse (13303132021213), we get a palindrome (44515155151544).

The spelling of 31212023130331 in words is "thirty-one trillion, two hundred twelve billion, twenty-three million, one hundred thirty thousand, three hundred thirty-one".