312202003221 has 12 divisors (see below), whose sum is σ = 450975685420. Its totient is φ = 208126713600.

The previous prime is 312202003213. The next prime is 312202003231. The reversal of 312202003221 is 122300202213.

It can be written as a sum of positive squares in 2 ways, for example, as 176122908900 + 136079094321 = 419670^2 + 368889^2 .

It is not a de Polignac number, because 312202003221 - 2³ = 312202003213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312202003194 and 312202003203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312202003231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 409276 + ... + 889893.

Almost surely, 2^312202003221 is an apocalyptic number.

It is an amenable number.

312202003221 is a deficient number, since it is larger than the sum of its proper divisors (138773682199).

312202003221 is a wasteful number, since it uses less digits than its factorization.

312202003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325876 (or 1325873 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 312202003221 its reverse (122300202213), we get a palindrome (434502205434).

The spelling of 312202003221 in words is "three hundred twelve billion, two hundred two million, three thousand, two hundred twenty-one".