311212111331 has 8 divisors (see below), whose sum is σ = 339509496000. Its totient is φ = 282915622440.

The previous prime is 311212111267. The next prime is 311212111369. The reversal of 311212111331 is 133111212113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 311212111331 - 2⁶ = 311212111267 is a prime.

It is a super-2 number, since 2×311212111331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311212111031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 651200 + ... + 1022978.

It is an arithmetic number, because the mean of its divisors is an integer number (42438687000).

Almost surely, 2^311212111331 is an apocalyptic number.

311212111331 is a deficient number, since it is larger than the sum of its proper divisors (28297384669).

311212111331 is a wasteful number, since it uses less digits than its factorization.

311212111331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447889.

The product of its digits is 108, while the sum is 20.

Adding to 311212111331 its reverse (133111212113), we get a palindrome (444323323444).

The spelling of 311212111331 in words is "three hundred eleven billion, two hundred twelve million, one hundred eleven thousand, three hundred thirty-one".