31201313123 has 2 divisors, whose sum is σ = 31201313124. Its totient is φ = 31201313122.

The previous prime is 31201313083. The next prime is 31201313141. The reversal of 31201313123 is 32131310213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31201313123 - 2²² = 31197118819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31201313095 and 31201313104.

It is not a weakly prime, because it can be changed into another prime (31201313723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600656561 + 15600656562.

It is an arithmetic number, because the mean of its divisors is an integer number (15600656562).

Almost surely, 2^31201313123 is an apocalyptic number.

31201313123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201313123 is an equidigital number, since it uses as much as digits as its factorization.

31201313123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31201313123 its reverse (32131310213), we get a palindrome (63332623336).

The spelling of 31201313123 in words is "thirty-one billion, two hundred one million, three hundred thirteen thousand, one hundred twenty-three".