221111121089 has 2 divisors, whose sum is σ = 221111121090. Its totient is φ = 221111121088.

The previous prime is 221111121067. The next prime is 221111121103. The reversal of 221111121089 is 980121111122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211471219600 + 9639901489 = 459860^2 + 98183^2 .

It is a cyclic number.

It is not a de Polignac number, because 221111121089 - 2²⁸ = 220842685633 is a prime.

It is not a weakly prime, because it can be changed into another prime (221111121019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555560544 + 110555560545.

It is an arithmetic number, because the mean of its divisors is an integer number (110555560545).

Almost surely, 2^221111121089 is an apocalyptic number.

It is an amenable number.

221111121089 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111121089 is an equidigital number, since it uses as much as digits as its factorization.

221111121089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 29.

The spelling of 221111121089 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, eighty-nine".