1121200211191 has 4 divisors (see below), whose sum is σ = 1139580542584. Its totient is φ = 1102819879800.

The previous prime is 1121200211171. The next prime is 1121200211203. The reversal of 1121200211191 is 1911120021211.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1121200211191 - 2⁷ = 1121200211063 is a prime.

It is a super-3 number, since 3×1121200211191³ (a number of 37 digits) contains 333 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 (1121200211171) 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, 9190165605 + ... + 9190165726.

It is an arithmetic number, because the mean of its divisors is an integer number (284895135646).

Almost surely, 2^{1121200211191} is an apocalyptic number.

1121200211191 is a deficient number, since it is larger than the sum of its proper divisors (18380331393).

1121200211191 is an equidigital number, since it uses as much as digits as its factorization.

1121200211191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18380331392.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 1121200211191 in words is "one trillion, one hundred twenty-one billion, two hundred million, two hundred eleven thousand, one hundred ninety-one".