311313121111 has 4 divisors (see below), whose sum is σ = 311511790912. Its totient is φ = 311114451312.

The previous prime is 311313121081. The next prime is 311313121121. The reversal of 311313121111 is 111121313113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111121313113 = 8291 ⋅13402643.

It is a cyclic number.

It is not a de Polignac number, because 311313121111 - 2¹¹ = 311313119063 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 (311313121121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99332550 + ... + 99335683.

It is an arithmetic number, because the mean of its divisors is an integer number (77877947728).

Almost surely, 2^311313121111 is an apocalyptic number.

311313121111 is a deficient number, since it is larger than the sum of its proper divisors (198669801).

311313121111 is a wasteful number, since it uses less digits than its factorization.

311313121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198669800.

The product of its digits is 54, while the sum is 19.

Adding to 311313121111 its reverse (111121313113), we get a palindrome (422434434224).

The spelling of 311313121111 in words is "three hundred eleven billion, three hundred thirteen million, one hundred twenty-one thousand, one hundred eleven".