311312003221 has 8 divisors (see below), whose sum is σ = 317949375744. Its totient is φ = 304675202160.

The previous prime is 311312003213. The next prime is 311312003231. The reversal of 311312003221 is 122300213113.

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 311312003221 - 2³ = 311312003213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311312003231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1066176 + ... + 1326406.

It is an arithmetic number, because the mean of its divisors is an integer number (39743671968).

Almost surely, 2^311312003221 is an apocalyptic number.

It is an amenable number.

311312003221 is a deficient number, since it is larger than the sum of its proper divisors (6637372523).

311312003221 is a wasteful number, since it uses less digits than its factorization.

311312003221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285731.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 311312003221 its reverse (122300213113), we get a palindrome (433612216334).

The spelling of 311312003221 in words is "three hundred eleven billion, three hundred twelve million, three thousand, two hundred twenty-one".