23031312011 has 4 divisors (see below), whose sum is σ = 23041161000. Its totient is φ = 23021463024.

The previous prime is 23031311987. The next prime is 23031312047. The reversal of 23031312011 is 11021313032.

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 23031312011 - 2¹⁰ = 23031310987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23031312091) 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, 4920986 + ... + 4925663.

It is an arithmetic number, because the mean of its divisors is an integer number (5760290250).

Almost surely, 2^23031312011 is an apocalyptic number.

23031312011 is a deficient number, since it is larger than the sum of its proper divisors (9848989).

23031312011 is an equidigital number, since it uses as much as digits as its factorization.

23031312011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9848988.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 23031312011 its reverse (11021313032), we get a palindrome (34052625043).

The spelling of 23031312011 in words is "twenty-three billion, thirty-one million, three hundred twelve thousand, eleven".