3121002131111 has 4 divisors (see below), whose sum is σ = 3121101301824. Its totient is φ = 3120902960400.

The previous prime is 3121002131041. The next prime is 3121002131179. The reversal of 3121002131111 is 1111312001213.

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 3121002131111 - 2¹⁰ = 3121002130087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3121002131111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121002131411) 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, 49538135 + ... + 49601096.

It is an arithmetic number, because the mean of its divisors is an integer number (780275325456).

Almost surely, 2^{3121002131111} is an apocalyptic number.

3121002131111 is a deficient number, since it is larger than the sum of its proper divisors (99170713).

3121002131111 is an equidigital number, since it uses as much as digits as its factorization.

3121002131111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99170712.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 3121002131111 its reverse (1111312001213), we get a palindrome (4232314132324).

The spelling of 3121002131111 in words is "three trillion, one hundred twenty-one billion, two million, one hundred thirty-one thousand, one hundred eleven".