191120801811 has 16 divisors (see below), whose sum is σ = 274782157440. Its totient is φ = 117763778880.

The previous prime is 191120801797. The next prime is 191120801821. The reversal of 191120801811 is 118108021191.

It is a happy number.

It is not a de Polignac number, because 191120801811 - 2⁵ = 191120801779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (191120801821) 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, 40887865 + ... + 40892538.

It is an arithmetic number, because the mean of its divisors is an integer number (17173884840).

Almost surely, 2^191120801811 is an apocalyptic number.

191120801811 is a deficient number, since it is larger than the sum of its proper divisors (83661355629).

191120801811 is a wasteful number, since it uses less digits than its factorization.

191120801811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81780466.

The product of its (nonzero) digits is 1152, while the sum is 33.

The spelling of 191120801811 in words is "one hundred ninety-one billion, one hundred twenty million, eight hundred one thousand, eight hundred eleven".