111021099289 has 2 divisors, whose sum is σ = 111021099290. Its totient is φ = 111021099288.

The previous prime is 111021099253. The next prime is 111021099347. The reversal of 111021099289 is 982990120111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110849043600 + 172055689 = 332940^2 + 13117^2 .

It is a cyclic number.

It is not a de Polignac number, because 111021099289 - 2¹¹ = 111021097241 is a prime.

It is not a weakly prime, because it can be changed into another prime (111021099389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510549644 + 55510549645.

It is an arithmetic number, because the mean of its divisors is an integer number (55510549645).

Almost surely, 2^111021099289 is an apocalyptic number.

It is an amenable number.

111021099289 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021099289 is an equidigital number, since it uses as much as digits as its factorization.

111021099289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 43.

The spelling of 111021099289 in words is "one hundred eleven billion, twenty-one million, ninety-nine thousand, two hundred eighty-nine".