312231003221 has 4 divisors (see below), whose sum is σ = 312232956000. Its totient is φ = 312229050444.

The previous prime is 312231003211. The next prime is 312231003239. The reversal of 312231003221 is 122300132213.

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 312231003221 - 2³⁰ = 311157261397 is a prime.

It is a super-2 number, since 2×312231003221² (a number of 24 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 = 312231003193 and 312231003202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312231003211) 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, 712841 + ... + 1064238.

It is an arithmetic number, because the mean of its divisors is an integer number (78058239000).

Almost surely, 2^312231003221 is an apocalyptic number.

It is an amenable number.

312231003221 is a deficient number, since it is larger than the sum of its proper divisors (1952779).

312231003221 is a wasteful number, since it uses less digits than its factorization.

312231003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952778.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 312231003221 its reverse (122300132213), we get a palindrome (434531135434).

The spelling of 312231003221 in words is "three hundred twelve billion, two hundred thirty-one million, three thousand, two hundred twenty-one".