312232130221 has 4 divisors (see below), whose sum is σ = 340616869344. Its totient is φ = 283847391100.

The previous prime is 312232130179. The next prime is 312232130269. The reversal of 312232130221 is 122031232213.

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 312232130221 - 2²¹ = 312230033069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312232130192 and 312232130201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312232130281) 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, 14192369545 + ... + 14192369566.

It is an arithmetic number, because the mean of its divisors is an integer number (85154217336).

Almost surely, 2^312232130221 is an apocalyptic number.

It is an amenable number.

312232130221 is a deficient number, since it is larger than the sum of its proper divisors (28384739123).

312232130221 is a wasteful number, since it uses less digits than its factorization.

312232130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28384739122.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 312232130221 its reverse (122031232213), we get a palindrome (434263362434).

The spelling of 312232130221 in words is "three hundred twelve billion, two hundred thirty-two million, one hundred thirty thousand, two hundred twenty-one".