111021099689 has 2 divisors, whose sum is σ = 111021099690. Its totient is φ = 111021099688.

The previous prime is 111021099667. The next prime is 111021099733. The reversal of 111021099689 is 986990120111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98944848025 + 12076251664 = 314555^2 + 109892^2 .

It is an emirp because it is prime and its reverse (986990120111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111021099689 - 2⁸ = 111021099433 is a prime.

It is not a weakly prime, because it can be changed into another prime (111021099289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510549844 + 55510549845.

It is an arithmetic number, because the mean of its divisors is an integer number (55510549845).

Almost surely, 2^111021099689 is an apocalyptic number.

It is an amenable number.

111021099689 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021099689 is an equidigital number, since it uses as much as digits as its factorization.

111021099689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 47.

The spelling of 111021099689 in words is "one hundred eleven billion, twenty-one million, ninety-nine thousand, six hundred eighty-nine".