111211010002091 has 4 divisors (see below), whose sum is σ = 112195178232312. Its totient is φ = 110226841771872.

The previous prime is 111211010002087. The next prime is 111211010002133. The reversal of 111211010002091 is 190200010112111.

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 111211010002091 - 2² = 111211010002087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111211010002021) 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, 492084114941 + ... + 492084115166.

It is an arithmetic number, because the mean of its divisors is an integer number (28048794558078).

Almost surely, 2^{111211010002091} is an apocalyptic number.

111211010002091 is a deficient number, since it is larger than the sum of its proper divisors (984168230221).

111211010002091 is an equidigital number, since it uses as much as digits as its factorization.

111211010002091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984168230220.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 111211010002091 in words is "one hundred eleven trillion, two hundred eleven billion, ten million, two thousand, ninety-one".