31213023001 has 2 divisors, whose sum is σ = 31213023002. Its totient is φ = 31213023000.

The previous prime is 31213022987. The next prime is 31213023013. The reversal of 31213023001 is 10032031213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26593781776 + 4619241225 = 163076^2 + 67965^2 .

It is an emirp because it is prime and its reverse (10032031213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31213023001 - 2⁵ = 31213022969 is a prime.

It is not a weakly prime, because it can be changed into another prime (31213033001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606511500 + 15606511501.

It is an arithmetic number, because the mean of its divisors is an integer number (15606511501).

Almost surely, 2^31213023001 is an apocalyptic number.

It is an amenable number.

31213023001 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213023001 is an equidigital number, since it uses as much as digits as its factorization.

31213023001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31213023001 its reverse (10032031213), we get a palindrome (41245054214).

The spelling of 31213023001 in words is "thirty-one billion, two hundred thirteen million, twenty-three thousand, one".