1111234455691 has 2 divisors, whose sum is σ = 1111234455692. Its totient is φ = 1111234455690.

The previous prime is 1111234455659. The next prime is 1111234455763. The reversal of 1111234455691 is 1965544321111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111234455691 - 2⁵ = 1111234455659 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111234455491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555617227845 + 555617227846.

It is an arithmetic number, because the mean of its divisors is an integer number (555617227846).

Almost surely, 2^{1111234455691} is an apocalyptic number.

1111234455691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111234455691 is an equidigital number, since it uses as much as digits as its factorization.

1111234455691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 43.

The spelling of 1111234455691 in words is "one trillion, one hundred eleven billion, two hundred thirty-four million, four hundred fifty-five thousand, six hundred ninety-one".