221988703093 has 2 divisors, whose sum is σ = 221988703094. Its totient is φ = 221988703092.

The previous prime is 221988703009. The next prime is 221988703109. The reversal of 221988703093 is 390307889122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220901880004 + 1086823089 = 470002^2 + 32967^2 .

It is a cyclic number.

It is not a de Polignac number, because 221988703093 - 2²⁹ = 221451832181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221988703093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221988703193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110994351546 + 110994351547.

It is an arithmetic number, because the mean of its divisors is an integer number (110994351547).

Almost surely, 2^221988703093 is an apocalyptic number.

It is an amenable number.

221988703093 is a deficient number, since it is larger than the sum of its proper divisors (1).

221988703093 is an equidigital number, since it uses as much as digits as its factorization.

221988703093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 221988703093 in words is "two hundred twenty-one billion, nine hundred eighty-eight million, seven hundred three thousand, ninety-three".