311000020221 has 48 divisors (see below), whose sum is σ = 460623219840. Its totient is φ = 186489072000.

The previous prime is 311000020217. The next prime is 311000020231. The reversal of 311000020221 is 122020000113.

311000020221 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 311000020221 - 2² = 311000020217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311000020197 and 311000020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311000020231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91765795 + ... + 91769183.

It is an arithmetic number, because the mean of its divisors is an integer number (9596317080).

Almost surely, 2^311000020221 is an apocalyptic number.

It is an amenable number.

311000020221 is a deficient number, since it is larger than the sum of its proper divisors (149623199619).

311000020221 is a wasteful number, since it uses less digits than its factorization.

311000020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6018 (or 6007 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 311000020221 its reverse (122020000113), we get a palindrome (433020020334).

The spelling of 311000020221 in words is "three hundred eleven billion, twenty thousand, two hundred twenty-one".