31320323011 has 2 divisors, whose sum is σ = 31320323012. Its totient is φ = 31320323010.

The previous prime is 31320323009. The next prime is 31320323107. The reversal of 31320323011 is 11032302313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31320323011 - 2¹ = 31320323009 is a prime.

It is a super-2 number, since 2×31320323011² (a number of 22 digits) contains 22 as substring.

Together with 31320323009, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31320323011.

It is not a weakly prime, because it can be changed into another prime (31320303011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660161505 + 15660161506.

It is an arithmetic number, because the mean of its divisors is an integer number (15660161506).

Almost surely, 2^31320323011 is an apocalyptic number.

31320323011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320323011 is an equidigital number, since it uses as much as digits as its factorization.

31320323011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31320323011 its reverse (11032302313), we get a palindrome (42352625324).

The spelling of 31320323011 in words is "thirty-one billion, three hundred twenty million, three hundred twenty-three thousand, eleven".