12320021313231 has 4 divisors (see below), whose sum is σ = 16426695084312. Its totient is φ = 8213347542152.

The previous prime is 12320021313199. The next prime is 12320021313337. The reversal of 12320021313231 is 13231312002321.

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 12320021313231 - 2⁵ = 12320021313199 is a prime.

It is a super-2 number, since 2×12320021313231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320021353231) 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, 2053336885536 + ... + 2053336885541.

It is an arithmetic number, because the mean of its divisors is an integer number (4106673771078).

Almost surely, 2^{12320021313231} is an apocalyptic number.

12320021313231 is a deficient number, since it is larger than the sum of its proper divisors (4106673771081).

12320021313231 is an equidigital number, since it uses as much as digits as its factorization.

12320021313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4106673771080.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 12320021313231 its reverse (13231312002321), we get a palindrome (25551333315552).

The spelling of 12320021313231 in words is "twelve trillion, three hundred twenty billion, twenty-one million, three hundred thirteen thousand, two hundred thirty-one".