3121311032111 has 2 divisors, whose sum is σ = 3121311032112. Its totient is φ = 3121311032110.

The previous prime is 3121311032011. The next prime is 3121311032113. The reversal of 3121311032111 is 1112301131213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3121311032111 - 2¹⁴ = 3121311015727 is a prime.

Together with 3121311032113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121311032113) 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 as a sum of consecutive naturals, namely, 1560655516055 + 1560655516056.

It is an arithmetic number, because the mean of its divisors is an integer number (1560655516056).

Almost surely, 2^{3121311032111} is an apocalyptic number.

3121311032111 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121311032111 is an equidigital number, since it uses as much as digits as its factorization.

3121311032111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 3121311032111 its reverse (1112301131213), we get a palindrome (4233612163324).

The spelling of 3121311032111 in words is "three trillion, one hundred twenty-one billion, three hundred eleven million, thirty-two thousand, one hundred eleven".