311153512111 has 4 divisors (see below), whose sum is σ = 335088397672. Its totient is φ = 287218626552.

The previous prime is 311153512063. The next prime is 311153512129. The reversal of 311153512111 is 111215351113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111215351113 = 2383 ⋅46670311.

It is not a de Polignac number, because 311153512111 - 2²³ = 311145123503 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 (311153512811) 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, 11967442761 + ... + 11967442786.

It is an arithmetic number, because the mean of its divisors is an integer number (83772099418).

Almost surely, 2^311153512111 is an apocalyptic number.

311153512111 is a deficient number, since it is larger than the sum of its proper divisors (23934885561).

311153512111 is a wasteful number, since it uses less digits than its factorization.

311153512111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23934885560.

The product of its digits is 450, while the sum is 25.

Adding to 311153512111 its reverse (111215351113), we get a palindrome (422368863224).

The spelling of 311153512111 in words is "three hundred eleven billion, one hundred fifty-three million, five hundred twelve thousand, one hundred eleven".