3131213033111 has 4 divisors (see below), whose sum is σ = 3131867692512. Its totient is φ = 3130558373712.

The previous prime is 3131213033071. The next prime is 3131213033131. The reversal of 3131213033111 is 1113303121313.

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 3131213033111 - 2³⁰ = 3130139291287 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 (3131213033131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327322526 + ... + 327332091.

It is an arithmetic number, because the mean of its divisors is an integer number (782966923128).

Almost surely, 2^{3131213033111} is an apocalyptic number.

3131213033111 is a deficient number, since it is larger than the sum of its proper divisors (654659401).

3131213033111 is an equidigital number, since it uses as much as digits as its factorization.

3131213033111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654659400.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 3131213033111 its reverse (1113303121313), we get a palindrome (4244516154424).

The spelling of 3131213033111 in words is "three trillion, one hundred thirty-one billion, two hundred thirteen million, thirty-three thousand, one hundred eleven".