221311111093 has 2 divisors, whose sum is σ = 221311111094. Its totient is φ = 221311111092.

The previous prime is 221311111031. The next prime is 221311111103. The reversal of 221311111093 is 390111113122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197617589764 + 23693521329 = 444542^2 + 153927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221311111093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221311111003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110655555546 + 110655555547.

It is an arithmetic number, because the mean of its divisors is an integer number (110655555547).

Almost surely, 2^221311111093 is an apocalyptic number.

It is an amenable number.

221311111093 is a deficient number, since it is larger than the sum of its proper divisors (1).

221311111093 is an equidigital number, since it uses as much as digits as its factorization.

221311111093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 221311111093 in words is "two hundred twenty-one billion, three hundred eleven million, one hundred eleven thousand, ninety-three".