111110211012209 has 2 divisors, whose sum is σ = 111110211012210. Its totient is φ = 111110211012208.

The previous prime is 111110211012181. The next prime is 111110211012239. The reversal of 111110211012209 is 902210112011111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107376535930225 + 3733675081984 = 10362265^2 + 1932272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111110211012209 is a prime.

It is a super-2 number, since 2×111110211012209² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111110211012239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555105506104 + 55555105506105.

It is an arithmetic number, because the mean of its divisors is an integer number (55555105506105).

Almost surely, 2^{111110211012209} is an apocalyptic number.

It is an amenable number.

111110211012209 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110211012209 is an equidigital number, since it uses as much as digits as its factorization.

111110211012209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 23.

The spelling of 111110211012209 in words is "one hundred eleven trillion, one hundred ten billion, two hundred eleven million, twelve thousand, two hundred nine".