1100021220191 has 4 divisors (see below), whose sum is σ = 1100028418032. Its totient is φ = 1100014022352.

The previous prime is 1100021220173. The next prime is 1100021220223. The reversal of 1100021220191 is 1910221200011.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100021220191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100021220161) 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, 3364595 + ... + 3677028.

It is an arithmetic number, because the mean of its divisors is an integer number (275007104508).

Almost surely, 2^{1100021220191} is an apocalyptic number.

1100021220191 is a deficient number, since it is larger than the sum of its proper divisors (7197841).

1100021220191 is an equidigital number, since it uses as much as digits as its factorization.

1100021220191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7197840.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1100021220191 in words is "one trillion, one hundred billion, twenty-one million, two hundred twenty thousand, one hundred ninety-one".