1231113112111 has 2 divisors, whose sum is σ = 1231113112112. Its totient is φ = 1231113112110.

The previous prime is 1231113112007. The next prime is 1231113112147. The reversal of 1231113112111 is 1112113111321.

It is a m-pointer prime, because the next prime (1231113112147) can be obtained adding 1231113112111 to its product of digits (36).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231113112111 - 2¹³ = 1231113103919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231113112711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615556556055 + 615556556056.

It is an arithmetic number, because the mean of its divisors is an integer number (615556556056).

Almost surely, 2^{1231113112111} is an apocalyptic number.

1231113112111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231113112111 is an equidigital number, since it uses as much as digits as its factorization.

1231113112111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 19.

Adding to 1231113112111 its reverse (1112113111321), we get a palindrome (2343226223432).

The spelling of 1231113112111 in words is "one trillion, two hundred thirty-one billion, one hundred thirteen million, one hundred twelve thousand, one hundred eleven".