31112030321 has 2 divisors, whose sum is σ = 31112030322. Its totient is φ = 31112030320.

The previous prime is 31112030317. The next prime is 31112030347. The reversal of 31112030321 is 12303021113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29868480625 + 1243549696 = 172825^2 + 35264^2 .

It is a cyclic number.

It is not a de Polignac number, because 31112030321 - 2² = 31112030317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31112030321.

It is not a weakly prime, because it can be changed into another prime (31112032321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556015160 + 15556015161.

It is an arithmetic number, because the mean of its divisors is an integer number (15556015161).

Almost surely, 2^31112030321 is an apocalyptic number.

It is an amenable number.

31112030321 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112030321 is an equidigital number, since it uses as much as digits as its factorization.

31112030321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31112030321 its reverse (12303021113), we get a palindrome (43415051434).

The spelling of 31112030321 in words is "thirty-one billion, one hundred twelve million, thirty thousand, three hundred twenty-one".