31322111011 has 4 divisors (see below), whose sum is σ = 31632231024. Its totient is φ = 31011991000.

The previous prime is 31322110979. The next prime is 31322111039. The reversal of 31322111011 is 11011122313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31322111011 - 2⁵ = 31322110979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31322114011) 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 in 3 ways as a sum of consecutive naturals, for example, 155059855 + ... + 155060056.

It is an arithmetic number, because the mean of its divisors is an integer number (7908057756).

Almost surely, 2^31322111011 is an apocalyptic number.

31322111011 is a deficient number, since it is larger than the sum of its proper divisors (310120013).

31322111011 is a wasteful number, since it uses less digits than its factorization.

31322111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310120012.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 31322111011 its reverse (11011122313), we get a palindrome (42333233324).

The spelling of 31322111011 in words is "thirty-one billion, three hundred twenty-two million, one hundred eleven thousand, eleven".