111021100219489 has 2 divisors, whose sum is σ = 111021100219490. Its totient is φ = 111021100219488.

The previous prime is 111021100219391. The next prime is 111021100219573. The reversal of 111021100219489 is 984912001120111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85676923729489 + 25344176490000 = 9256183^2 + 5034300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111021100219489 is a prime.

It is a super-2 number, since 2×111021100219489² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111021100219889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510550109744 + 55510550109745.

It is an arithmetic number, because the mean of its divisors is an integer number (55510550109745).

Almost surely, 2^{111021100219489} is an apocalyptic number.

It is an amenable number.

111021100219489 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021100219489 is an equidigital number, since it uses as much as digits as its factorization.

111021100219489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 40.

The spelling of 111021100219489 in words is "one hundred eleven trillion, twenty-one billion, one hundred million, two hundred nineteen thousand, four hundred eighty-nine".