311113433013221 has 16 divisors (see below), whose sum is σ = 324309727843200. Its totient is φ = 298081849665600.

The previous prime is 311113433013209. The next prime is 311113433013269. The reversal of 311113433013221 is 122310334311113.

It is a cyclic number.

It is not a de Polignac number, because 311113433013221 - 2⁶ = 311113433013157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311113433003221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107339015 + ... + 110199323.

It is an arithmetic number, because the mean of its divisors is an integer number (20269357990200).

Almost surely, 2^{311113433013221} is an apocalyptic number.

It is an amenable number.

311113433013221 is a deficient number, since it is larger than the sum of its proper divisors (13196294829979).

311113433013221 is a wasteful number, since it uses less digits than its factorization.

311113433013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2889100.

The product of its (nonzero) digits is 3888, while the sum is 29.

Adding to 311113433013221 its reverse (122310334311113), we get a palindrome (433423767324334).

The spelling of 311113433013221 in words is "three hundred eleven trillion, one hundred thirteen billion, four hundred thirty-three million, thirteen thousand, two hundred twenty-one".