221022234187 has 2 divisors, whose sum is σ = 221022234188. Its totient is φ = 221022234186.

The previous prime is 221022234163. The next prime is 221022234203. The reversal of 221022234187 is 781432220122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221022234187 is a prime.

It is not a weakly prime, because it can be changed into another prime (221022234787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110511117093 + 110511117094.

It is an arithmetic number, because the mean of its divisors is an integer number (110511117094).

Almost surely, 2^221022234187 is an apocalyptic number.

221022234187 is a deficient number, since it is larger than the sum of its proper divisors (1).

221022234187 is an equidigital number, since it uses as much as digits as its factorization.

221022234187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 34.

The spelling of 221022234187 in words is "two hundred twenty-one billion, twenty-two million, two hundred thirty-four thousand, one hundred eighty-seven".