12021131233 has 4 divisors (see below), whose sum is σ = 12224879280. Its totient is φ = 11817383188.

The previous prime is 12021131209. The next prime is 12021131251. The reversal of 12021131233 is 33213112021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12021131233 - 2²⁵ = 11987576801 is a prime.

It is a super-2 number, since 2×12021131233² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12021131233.

It is not an unprimeable number, because it can be changed into a prime (12021134233) 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, 101873935 + ... + 101874052.

It is an arithmetic number, because the mean of its divisors is an integer number (3056219820).

Almost surely, 2^12021131233 is an apocalyptic number.

It is an amenable number.

12021131233 is a deficient number, since it is larger than the sum of its proper divisors (203748047).

12021131233 is an equidigital number, since it uses as much as digits as its factorization.

12021131233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203748046.

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

Adding to 12021131233 its reverse (33213112021), we get a palindrome (45234243254).

The spelling of 12021131233 in words is "twelve billion, twenty-one million, one hundred thirty-one thousand, two hundred thirty-three".