311321421025 has 12 divisors (see below), whose sum is σ = 386048910832. Its totient is φ = 249050460240.

The previous prime is 311321421013. The next prime is 311321421043. The reversal of 311321421025 is 520124123113.

It is not a de Polignac number, because 311321421025 - 2¹³ = 311321412833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 924154 + ... + 1215196.

Almost surely, 2^311321421025 is an apocalyptic number.

It is an amenable number.

311321421025 is a deficient number, since it is larger than the sum of its proper divisors (74727489807).

311321421025 is a wasteful number, since it uses less digits than its factorization.

311321421025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333840 (or 333835 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 311321421025 its reverse (520124123113), we get a palindrome (831445544138).

The spelling of 311321421025 in words is "three hundred eleven billion, three hundred twenty-one million, four hundred twenty-one thousand, twenty-five".