31321011011 has 4 divisors (see below), whose sum is σ = 31321382400. Its totient is φ = 31320639624.

The previous prime is 31321010993. The next prime is 31321011019. The reversal of 31321011011 is 11011012313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31321011011 - 2³⁰ = 30247269187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31321011019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8510 + ... + 250428.

It is an arithmetic number, because the mean of its divisors is an integer number (7830345600).

Almost surely, 2^31321011011 is an apocalyptic number.

31321011011 is a deficient number, since it is larger than the sum of its proper divisors (371389).

31321011011 is a wasteful number, since it uses less digits than its factorization.

31321011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371388.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 31321011011 its reverse (11011012313), we get a palindrome (42332023324).

The spelling of 31321011011 in words is "thirty-one billion, three hundred twenty-one million, eleven thousand, eleven".