31323201311 has 2 divisors, whose sum is σ = 31323201312. Its totient is φ = 31323201310.

The previous prime is 31323201253. The next prime is 31323201331. The reversal of 31323201311 is 11310232313.

It is an a-pointer prime, because the next prime (31323201331) can be obtained adding 31323201311 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31323201311 - 2²⁶ = 31256092447 is a prime.

It is a super-2 number, since 2×31323201311² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31323201331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15661600655 + 15661600656.

It is an arithmetic number, because the mean of its divisors is an integer number (15661600656).

Almost surely, 2^31323201311 is an apocalyptic number.

31323201311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31323201311 is an equidigital number, since it uses as much as digits as its factorization.

31323201311 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 31323201311 its reverse (11310232313), we get a palindrome (42633433624).

The spelling of 31323201311 in words is "thirty-one billion, three hundred twenty-three million, two hundred one thousand, three hundred eleven".