311221334201 has 2 divisors, whose sum is σ = 311221334202. Its totient is φ = 311221334200.

The previous prime is 311221334057. The next prime is 311221334213. The reversal of 311221334201 is 102433122113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 270488407225 + 40732926976 = 520085^2 + 201824^2 .

It is a cyclic number.

It is not a de Polignac number, because 311221334201 - 2³⁴ = 294041465017 is a prime.

It is not a weakly prime, because it can be changed into another prime (311221334231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155610667100 + 155610667101.

It is an arithmetic number, because the mean of its divisors is an integer number (155610667101).

Almost surely, 2^311221334201 is an apocalyptic number.

It is an amenable number.

311221334201 is a deficient number, since it is larger than the sum of its proper divisors (1).

311221334201 is an equidigital number, since it uses as much as digits as its factorization.

311221334201 is an odious number, because the sum of its binary digits is odd.

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

Adding to 311221334201 its reverse (102433122113), we get a palindrome (413654456314).

The spelling of 311221334201 in words is "three hundred eleven billion, two hundred twenty-one million, three hundred thirty-four thousand, two hundred one".