312232020221 has 8 divisors (see below), whose sum is σ = 355426173504. Its totient is φ = 271506104320.

The previous prime is 312232020209. The next prime is 312232020251. The reversal of 312232020221 is 122020232213.

It is a happy number.

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-312232020221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312232020193 and 312232020202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312232020251) 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, 617059076 + ... + 617059581.

It is an arithmetic number, because the mean of its divisors is an integer number (44428271688).

Almost surely, 2^312232020221 is an apocalyptic number.

It is an amenable number.

312232020221 is a deficient number, since it is larger than the sum of its proper divisors (43194153283).

312232020221 is a wasteful number, since it uses less digits than its factorization.

312232020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234118691.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 312232020221 its reverse (122020232213), we get a palindrome (434252252434).

The spelling of 312232020221 in words is "three hundred twelve billion, two hundred thirty-two million, twenty thousand, two hundred twenty-one".