311421030133 has 2 divisors, whose sum is σ = 311421030134. Its totient is φ = 311421030132.

The previous prime is 311421030079. The next prime is 311421030181. The reversal of 311421030133 is 331030124113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172625292324 + 138795737809 = 415482^2 + 372553^2 .

It is a cyclic number.

It is not a de Polignac number, because 311421030133 - 2³⁷ = 173982076661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311421030233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155710515066 + 155710515067.

It is an arithmetic number, because the mean of its divisors is an integer number (155710515067).

Almost surely, 2^311421030133 is an apocalyptic number.

It is an amenable number.

311421030133 is a deficient number, since it is larger than the sum of its proper divisors (1).

311421030133 is an equidigital number, since it uses as much as digits as its factorization.

311421030133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 311421030133 its reverse (331030124113), we get a palindrome (642451154246).

The spelling of 311421030133 in words is "three hundred eleven billion, four hundred twenty-one million, thirty thousand, one hundred thirty-three".