221012222222191 has 2 divisors, whose sum is σ = 221012222222192. Its totient is φ = 221012222222190.

The previous prime is 221012222222117. The next prime is 221012222222227. The reversal of 221012222222191 is 191222222210122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221012222222191 - 2⁴¹ = 218813198966639 is a prime.

It is a super-2 number, since 2×221012222222191² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221012222222101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506111111095 + 110506111111096.

It is an arithmetic number, because the mean of its divisors is an integer number (110506111111096).

Almost surely, 2^{221012222222191} is an apocalyptic number.

221012222222191 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012222222191 is an equidigital number, since it uses as much as digits as its factorization.

221012222222191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 221012222222191 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred ninety-one".