1111220110691 has 2 divisors, whose sum is σ = 1111220110692. Its totient is φ = 1111220110690.

The previous prime is 1111220110643. The next prime is 1111220110703. The reversal of 1111220110691 is 1960110221111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1111220110691 - 2³⁸ = 836342203747 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111220110691.

It is not a weakly prime, because it can be changed into another prime (1111220110291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555610055345 + 555610055346.

It is an arithmetic number, because the mean of its divisors is an integer number (555610055346).

Almost surely, 2^{1111220110691} is an apocalyptic number.

1111220110691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111220110691 is an equidigital number, since it uses as much as digits as its factorization.

1111220110691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 26.

The spelling of 1111220110691 in words is "one trillion, one hundred eleven billion, two hundred twenty million, one hundred ten thousand, six hundred ninety-one".