12013232311 has 4 divisors (see below), whose sum is σ = 12075477232. Its totient is φ = 11950987392.

The previous prime is 12013232303. The next prime is 12013232351. The reversal of 12013232311 is 11323231021.

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 12013232311 - 2³ = 12013232303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013232351) 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, 31122171 + ... + 31122556.

It is an arithmetic number, because the mean of its divisors is an integer number (3018869308).

Almost surely, 2^12013232311 is an apocalyptic number.

12013232311 is a deficient number, since it is larger than the sum of its proper divisors (62244921).

12013232311 is an equidigital number, since it uses as much as digits as its factorization.

12013232311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62244920.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12013232311 its reverse (11323231021), we get a palindrome (23336463332).

The spelling of 12013232311 in words is "twelve billion, thirteen million, two hundred thirty-two thousand, three hundred eleven".