31201023313123 has 2 divisors, whose sum is σ = 31201023313124. Its totient is φ = 31201023313122.

The previous prime is 31201023313087. The next prime is 31201023313139. The reversal of 31201023313123 is 32131332010213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31201023313123 is a prime.

It is not a weakly prime, because it can be changed into another prime (31201023913123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600511656561 + 15600511656562.

It is an arithmetic number, because the mean of its divisors is an integer number (15600511656562).

Almost surely, 2^{31201023313123} is an apocalyptic number.

31201023313123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201023313123 is an equidigital number, since it uses as much as digits as its factorization.

31201023313123 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 31201023313123 its reverse (32131332010213), we get a palindrome (63332355323336).

The spelling of 31201023313123 in words is "thirty-one trillion, two hundred one billion, twenty-three million, three hundred thirteen thousand, one hundred twenty-three".