3121022131111 has 2 divisors, whose sum is σ = 3121022131112. Its totient is φ = 3121022131110.

The previous prime is 3121022131109. The next prime is 3121022131147. The reversal of 3121022131111 is 1111312201213.

It is a weak prime.

It is an emirp because it is prime and its reverse (1111312201213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3121022131111 - 2¹ = 3121022131109 is a prime.

Together with 3121022131109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121022131181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560511065555 + 1560511065556.

It is an arithmetic number, because the mean of its divisors is an integer number (1560511065556).

Almost surely, 2^{3121022131111} is an apocalyptic number.

3121022131111 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121022131111 is an equidigital number, since it uses as much as digits as its factorization.

3121022131111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 3121022131111 its reverse (1111312201213), we get a palindrome (4232334332324).

The spelling of 3121022131111 in words is "three trillion, one hundred twenty-one billion, twenty-two million, one hundred thirty-one thousand, one hundred eleven".