12312220231 has 8 divisors (see below), whose sum is σ = 12470068800. Its totient is φ = 12154421760.

The previous prime is 12312220211. The next prime is 12312220243. The reversal of 12312220231 is 13202221321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12312220231 is a prime.

It is a super-2 number, since 2×12312220231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12312220199 and 12312220208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312220201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 967671 + ... + 980311.

It is an arithmetic number, because the mean of its divisors is an integer number (1558758600).

Almost surely, 2^12312220231 is an apocalyptic number.

12312220231 is a deficient number, since it is larger than the sum of its proper divisors (157848569).

12312220231 is a wasteful number, since it uses less digits than its factorization.

12312220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25049.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12312220231 its reverse (13202221321), we get a palindrome (25514441552).

The spelling of 12312220231 in words is "twelve billion, three hundred twelve million, two hundred twenty thousand, two hundred thirty-one".