31323031011 has 12 divisors (see below), whose sum is σ = 45274701888. Its totient is φ = 20868025104.

The previous prime is 31323030979. The next prime is 31323031027. The reversal of 31323031011 is 11013032313.

It is a happy number.

31323031011 is a `hidden beast` number, since 31 + 323 + 0 + 310 + 1 + 1 = 666.

It is not a de Polignac number, because 31323031011 - 2⁵ = 31323030979 is a prime.

It is a super-2 number, since 2×31323031011² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31323031711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1152115 + ... + 1178988.

It is an arithmetic number, because the mean of its divisors is an integer number (3772891824).

Almost surely, 2^31323031011 is an apocalyptic number.

31323031011 is a deficient number, since it is larger than the sum of its proper divisors (13951670877).

31323031011 is a wasteful number, since it uses less digits than its factorization.

31323031011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332602 (or 2332599 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31323031011 its reverse (11013032313), we get a palindrome (42336063324).

The spelling of 31323031011 in words is "thirty-one billion, three hundred twenty-three million, thirty-one thousand, eleven".