221133313310891 has 2 divisors, whose sum is σ = 221133313310892. Its totient is φ = 221133313310890.

The previous prime is 221133313310851. The next prime is 221133313311017. The reversal of 221133313310891 is 198013313331122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221133313310891 - 2³⁰ = 221132239569067 is a prime.

It is not a weakly prime, because it can be changed into another prime (221133313310851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110566656655445 + 110566656655446.

It is an arithmetic number, because the mean of its divisors is an integer number (110566656655446).

Almost surely, 2^{221133313310891} is an apocalyptic number.

221133313310891 is a deficient number, since it is larger than the sum of its proper divisors (1).

221133313310891 is an equidigital number, since it uses as much as digits as its factorization.

221133313310891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 221133313310891 in words is "two hundred twenty-one trillion, one hundred thirty-three billion, three hundred thirteen million, three hundred ten thousand, eight hundred ninety-one".