1111111201091 has 16 divisors (see below), whose sum is σ = 1136538224640. Its totient is φ = 1085759822400.

The previous prime is 1111111201069. The next prime is 1111111201129. The reversal of 1111111201091 is 1901021111111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1111111201091 - 2⁶ = 1111111201027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111111201061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116329766 + ... + 116339316.

It is an arithmetic number, because the mean of its divisors is an integer number (71033639040).

Almost surely, 2^{1111111201091} is an apocalyptic number.

1111111201091 is a deficient number, since it is larger than the sum of its proper divisors (25427023549).

1111111201091 is an equidigital number, since it uses as much as digits as its factorization.

1111111201091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13234.

The product of its (nonzero) digits is 18, while the sum is 20.

The spelling of 1111111201091 in words is "one trillion, one hundred eleven billion, one hundred eleven million, two hundred one thousand, ninety-one".