31313200123 has 2 divisors, whose sum is σ = 31313200124. Its totient is φ = 31313200122.

The previous prime is 31313200111. The next prime is 31313200129. The reversal of 31313200123 is 32100231313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31313200123 - 2⁵ = 31313200091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31313200123.

It is not a weakly prime, because it can be changed into another prime (31313200129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656600061 + 15656600062.

It is an arithmetic number, because the mean of its divisors is an integer number (15656600062).

Almost surely, 2^31313200123 is an apocalyptic number.

31313200123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313200123 is an equidigital number, since it uses as much as digits as its factorization.

31313200123 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 19.

Adding to 31313200123 its reverse (32100231313), we get a palindrome (63413431436).

The spelling of 31313200123 in words is "thirty-one billion, three hundred thirteen million, two hundred thousand, one hundred twenty-three".