311021313103 has 4 divisors (see below), whose sum is σ = 329316684480. Its totient is φ = 292725941728.

The previous prime is 311021313089. The next prime is 311021313121. The reversal of 311021313103 is 301313120113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 311021313103 - 2²⁵ = 310987758671 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 (311021313133) 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, 9147685663 + ... + 9147685696.

It is an arithmetic number, because the mean of its divisors is an integer number (82329171120).

Almost surely, 2^311021313103 is an apocalyptic number.

311021313103 is a deficient number, since it is larger than the sum of its proper divisors (18295371377).

311021313103 is a wasteful number, since it uses less digits than its factorization.

311021313103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18295371376.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 311021313103 its reverse (301313120113), we get a palindrome (612334433216).

The spelling of 311021313103 in words is "three hundred eleven billion, twenty-one million, three hundred thirteen thousand, one hundred three".