221200222200091 has 2 divisors, whose sum is σ = 221200222200092. Its totient is φ = 221200222200090.

The previous prime is 221200222200079. The next prime is 221200222200137. The reversal of 221200222200091 is 190002222002122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221200222200091 - 2²⁹ = 221199685329179 is a prime.

It is not a weakly prime, because it can be changed into another prime (221200222200011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600111100045 + 110600111100046.

It is an arithmetic number, because the mean of its divisors is an integer number (110600111100046).

Almost surely, 2^{221200222200091} is an apocalyptic number.

221200222200091 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200222200091 is an equidigital number, since it uses as much as digits as its factorization.

221200222200091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 221200222200091 in words is "two hundred twenty-one trillion, two hundred billion, two hundred twenty-two million, two hundred thousand, ninety-one".