221989405111 has 2 divisors, whose sum is σ = 221989405112. Its totient is φ = 221989405110.

The previous prime is 221989405109. The next prime is 221989405147. The reversal of 221989405111 is 111504989122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221989405111 - 2¹ = 221989405109 is a prime.

Together with 221989405109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221989405171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110994702555 + 110994702556.

It is an arithmetic number, because the mean of its divisors is an integer number (110994702556).

Almost surely, 2^221989405111 is an apocalyptic number.

221989405111 is a deficient number, since it is larger than the sum of its proper divisors (1).

221989405111 is an equidigital number, since it uses as much as digits as its factorization.

221989405111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 43.

The spelling of 221989405111 in words is "two hundred twenty-one billion, nine hundred eighty-nine million, four hundred five thousand, one hundred eleven".