311134203221 has 4 divisors (see below), whose sum is σ = 311137570944. Its totient is φ = 311130835500.

The previous prime is 311134203209. The next prime is 311134203251. The reversal of 311134203221 is 122302431113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 311134203221 - 2³⁰ = 310060461397 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 (311134203251) 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 3 ways as a sum of consecutive naturals, for example, 1541255 + ... + 1731396.

It is an arithmetic number, because the mean of its divisors is an integer number (77784392736).

Almost surely, 2^311134203221 is an apocalyptic number.

It is an amenable number.

311134203221 is a deficient number, since it is larger than the sum of its proper divisors (3367723).

311134203221 is an equidigital number, since it uses as much as digits as its factorization.

311134203221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3367722.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 311134203221 its reverse (122302431113), we get a palindrome (433436634334).

The spelling of 311134203221 in words is "three hundred eleven billion, one hundred thirty-four million, two hundred three thousand, two hundred twenty-one".