221102994855643 has 2 divisors, whose sum is σ = 221102994855644. Its totient is φ = 221102994855642.

The previous prime is 221102994855571. The next prime is 221102994855647. The reversal of 221102994855643 is 346558499201122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221102994855643 - 2²¹ = 221102992758491 is a prime.

It is not a weakly prime, because it can be changed into another prime (221102994855647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110551497427821 + 110551497427822.

It is an arithmetic number, because the mean of its divisors is an integer number (110551497427822).

Almost surely, 2^{221102994855643} is an apocalyptic number.

221102994855643 is a deficient number, since it is larger than the sum of its proper divisors (1).

221102994855643 is an equidigital number, since it uses as much as digits as its factorization.

221102994855643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37324800, while the sum is 61.

The spelling of 221102994855643 in words is "two hundred twenty-one trillion, one hundred two billion, nine hundred ninety-four million, eight hundred fifty-five thousand, six hundred forty-three".