312220232221 has 8 divisors (see below), whose sum is σ = 330635450880. Its totient is φ = 293810493888.

The previous prime is 312220232201. The next prime is 312220232227. The reversal of 312220232221 is 122232022213.

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

It is a cyclic number.

It is not a de Polignac number, because 312220232221 - 2¹¹ = 312220230173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312220232192 and 312220232201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312220232227) 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, 1252491 + ... + 1480936.

It is an arithmetic number, because the mean of its divisors is an integer number (41329431360).

Almost surely, 2^312220232221 is an apocalyptic number.

It is an amenable number.

312220232221 is a deficient number, since it is larger than the sum of its proper divisors (18415218659).

312220232221 is a wasteful number, since it uses less digits than its factorization.

312220232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740163.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 312220232221 its reverse (122232022213), we get a palindrome (434452254434).

The spelling of 312220232221 in words is "three hundred twelve billion, two hundred twenty million, two hundred thirty-two thousand, two hundred twenty-one".