31012300961 has 2 divisors, whose sum is σ = 31012300962. Its totient is φ = 31012300960.

The previous prime is 31012300927. The next prime is 31012301081. The reversal of 31012300961 is 16900321013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24161593600 + 6850707361 = 155440^2 + 82769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31012300961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31012300961.

It is not a weakly prime, because it can be changed into another prime (31012300661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506150480 + 15506150481.

It is an arithmetic number, because the mean of its divisors is an integer number (15506150481).

Almost surely, 2^31012300961 is an apocalyptic number.

It is an amenable number.

31012300961 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012300961 is an equidigital number, since it uses as much as digits as its factorization.

31012300961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

Adding to 31012300961 its reverse (16900321013), we get a palindrome (47912621974).

The spelling of 31012300961 in words is "thirty-one billion, twelve million, three hundred thousand, nine hundred sixty-one".