3111212131331 has 4 divisors (see below), whose sum is σ = 3111303181872. Its totient is φ = 3111121080792.

The previous prime is 3111212131327. The next prime is 3111212131361. The reversal of 3111212131331 is 1331312121113.

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 3111212131331 - 2² = 3111212131327 is a prime.

It is a super-2 number, since 2×3111212131331² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3111212131297 and 3111212131306.

It is not an unprimeable number, because it can be changed into a prime (3111212131361) 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, 45473996 + ... + 45542361.

It is an arithmetic number, because the mean of its divisors is an integer number (777825795468).

Almost surely, 2^{3111212131331} is an apocalyptic number.

3111212131331 is a deficient number, since it is larger than the sum of its proper divisors (91050541).

3111212131331 is an equidigital number, since it uses as much as digits as its factorization.

3111212131331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91050540.

The product of its digits is 324, while the sum is 23.

Adding to 3111212131331 its reverse (1331312121113), we get a palindrome (4442524252444).

The spelling of 3111212131331 in words is "three trillion, one hundred eleven billion, two hundred twelve million, one hundred thirty-one thousand, three hundred thirty-one".