31012334321 has 2 divisors, whose sum is σ = 31012334322. Its totient is φ = 31012334320.

The previous prime is 31012334317. The next prime is 31012334333. The reversal of 31012334321 is 12343321013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26361094321 + 4651240000 = 162361^2 + 68200^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012334321 - 2² = 31012334317 is a prime.

It is not a weakly prime, because it can be changed into another prime (31042334321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506167160 + 15506167161.

It is an arithmetic number, because the mean of its divisors is an integer number (15506167161).

Almost surely, 2^31012334321 is an apocalyptic number.

It is an amenable number.

31012334321 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012334321 is an equidigital number, since it uses as much as digits as its factorization.

31012334321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31012334321 its reverse (12343321013), we get a palindrome (43355655334).

The spelling of 31012334321 in words is "thirty-one billion, twelve million, three hundred thirty-four thousand, three hundred twenty-one".