31323201113 has 2 divisors, whose sum is σ = 31323201114. Its totient is φ = 31323201112.

The previous prime is 31323201109. The next prime is 31323201157. The reversal of 31323201113 is 31110232313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16232798464 + 15090402649 = 127408^2 + 122843^2 .

It is a cyclic number.

It is not a de Polignac number, because 31323201113 - 2² = 31323201109 is a prime.

It is a super-2 number, since 2×31323201113² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31323204113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15661600556 + 15661600557.

It is an arithmetic number, because the mean of its divisors is an integer number (15661600557).

Almost surely, 2^31323201113 is an apocalyptic number.

It is an amenable number.

31323201113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31323201113 is an equidigital number, since it uses as much as digits as its factorization.

31323201113 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 31323201113 its reverse (31110232313), we get a palindrome (62433433426).

The spelling of 31323201113 in words is "thirty-one billion, three hundred twenty-three million, two hundred one thousand, one hundred thirteen".