12312201031 has 4 divisors (see below), whose sum is σ = 13259293432. Its totient is φ = 11365108632.

The previous prime is 12312200959. The next prime is 12312201061. The reversal of 12312201031 is 13010221321.

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 12312201031 - 2¹³ = 12312192839 is a prime.

It is a super-2 number, since 2×12312201031² (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 = 12312200996 and 12312201014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312201061) 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, 473546181 + ... + 473546206.

It is an arithmetic number, because the mean of its divisors is an integer number (3314823358).

Almost surely, 2^12312201031 is an apocalyptic number.

12312201031 is a deficient number, since it is larger than the sum of its proper divisors (947092401).

12312201031 is an equidigital number, since it uses as much as digits as its factorization.

12312201031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947092400.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12312201031 its reverse (13010221321), we get a palindrome (25322422352).

The spelling of 12312201031 in words is "twelve billion, three hundred twelve million, two hundred one thousand, thirty-one".