31320023011 has 4 divisors (see below), whose sum is σ = 31401798912. Its totient is φ = 31238247112.

The previous prime is 31320022999. The next prime is 31320023017. The reversal of 31320023011 is 11032002313.

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 31320023011 - 2¹⁹ = 31319498723 is a prime.

It is a super-2 number, since 2×31320023011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31320023017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40887376 + ... + 40888141.

It is an arithmetic number, because the mean of its divisors is an integer number (7850449728).

Almost surely, 2^31320023011 is an apocalyptic number.

31320023011 is a deficient number, since it is larger than the sum of its proper divisors (81775901).

31320023011 is an equidigital number, since it uses as much as digits as its factorization.

31320023011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81775900.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31320023011 its reverse (11032002313), we get a palindrome (42352025324).

The spelling of 31320023011 in words is "thirty-one billion, three hundred twenty million, twenty-three thousand, eleven".