111213404209 has 2 divisors, whose sum is σ = 111213404210. Its totient is φ = 111213404208.

The previous prime is 111213404171. The next prime is 111213404213. The reversal of 111213404209 is 902404312111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102951139600 + 8262264609 = 320860^2 + 90897^2 .

It is a cyclic number.

It is not a de Polignac number, because 111213404209 - 2²³ = 111205015601 is a prime.

It is not a weakly prime, because it can be changed into another prime (111213404219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606702104 + 55606702105.

It is an arithmetic number, because the mean of its divisors is an integer number (55606702105).

Almost surely, 2^111213404209 is an apocalyptic number.

It is an amenable number.

111213404209 is a deficient number, since it is larger than the sum of its proper divisors (1).

111213404209 is an equidigital number, since it uses as much as digits as its factorization.

111213404209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 111213404209 in words is "one hundred eleven billion, two hundred thirteen million, four hundred four thousand, two hundred nine".