111020110001209 has 2 divisors, whose sum is σ = 111020110001210. Its totient is φ = 111020110001208.

The previous prime is 111020110001183. The next prime is 111020110001221. The reversal of 111020110001209 is 902100011020111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78850794761209 + 32169315240000 = 8879797^2 + 5671800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111020110001209 is a prime.

It is not a weakly prime, because it can be changed into another prime (111020110005209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510055000604 + 55510055000605.

It is an arithmetic number, because the mean of its divisors is an integer number (55510055000605).

Almost surely, 2^{111020110001209} is an apocalyptic number.

It is an amenable number.

111020110001209 is a deficient number, since it is larger than the sum of its proper divisors (1).

111020110001209 is an equidigital number, since it uses as much as digits as its factorization.

111020110001209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 111020110001209 in words is "one hundred eleven trillion, twenty billion, one hundred ten million, one thousand, two hundred nine".