12002011231 has 4 divisors (see below), whose sum is σ = 13716584272. Its totient is φ = 10287438192.

The previous prime is 12002011223. The next prime is 12002011283. The reversal of 12002011231 is 13211020021.

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 12002011231 - 2³ = 12002011223 is a prime.

It is a super-2 number, since 2×12002011231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002011531) 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, 857286510 + ... + 857286523.

It is an arithmetic number, because the mean of its divisors is an integer number (3429146068).

Almost surely, 2^12002011231 is an apocalyptic number.

12002011231 is a deficient number, since it is larger than the sum of its proper divisors (1714573041).

12002011231 is an equidigital number, since it uses as much as digits as its factorization.

12002011231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714573040.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12002011231 its reverse (13211020021), we get a palindrome (25213031252).

The spelling of 12002011231 in words is "twelve billion, two million, eleven thousand, two hundred thirty-one".