11611111312111 has 2 divisors, whose sum is σ = 11611111312112. Its totient is φ = 11611111312110.

The previous prime is 11611111312103. The next prime is 11611111312147. The reversal of 11611111312111 is 11121311111611.

It is a m-pointer prime, because the next prime (11611111312147) can be obtained adding 11611111312111 to its product of digits (36).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11611111312111 - 2³ = 11611111312103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11611111312211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5805555656055 + 5805555656056.

It is an arithmetic number, because the mean of its divisors is an integer number (5805555656056).

Almost surely, 2^{11611111312111} is an apocalyptic number.

11611111312111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11611111312111 is an equidigital number, since it uses as much as digits as its factorization.

11611111312111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 22.

Adding to 11611111312111 its reverse (11121311111611), we get a palindrome (22732422423722).

The spelling of 11611111312111 in words is "eleven trillion, six hundred eleven billion, one hundred eleven million, three hundred twelve thousand, one hundred eleven".