221110199971 has 2 divisors, whose sum is σ = 221110199972. Its totient is φ = 221110199970.

The previous prime is 221110199953. The next prime is 221110200023. The reversal of 221110199971 is 179991011122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221110199971 - 2¹⁵ = 221110167203 is a prime.

It is not a weakly prime, because it can be changed into another prime (221110169971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555099985 + 110555099986.

It is an arithmetic number, because the mean of its divisors is an integer number (110555099986).

Almost surely, 2^221110199971 is an apocalyptic number.

221110199971 is a deficient number, since it is larger than the sum of its proper divisors (1).

221110199971 is an equidigital number, since it uses as much as digits as its factorization.

221110199971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 43.

The spelling of 221110199971 in words is "two hundred twenty-one billion, one hundred ten million, one hundred ninety-nine thousand, nine hundred seventy-one".