1111102012191 has 4 divisors (see below), whose sum is σ = 1481469349592. Its totient is φ = 740734674792.

The previous prime is 1111102012133. The next prime is 1111102012199. The reversal of 1111102012191 is 1912102011111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1111102012191 - 2¹¹ = 1111102010143 is a prime.

It is a super-2 number, since 2×1111102012191² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111102012199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185183668696 + ... + 185183668701.

It is an arithmetic number, because the mean of its divisors is an integer number (370367337398).

Almost surely, 2^{1111102012191} is an apocalyptic number.

1111102012191 is a deficient number, since it is larger than the sum of its proper divisors (370367337401).

1111102012191 is an equidigital number, since it uses as much as digits as its factorization.

1111102012191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370367337400.

The product of its (nonzero) digits is 36, while the sum is 21.

The spelling of 1111102012191 in words is "one trillion, one hundred eleven billion, one hundred two million, twelve thousand, one hundred ninety-one".