121112121202209 has 6 divisors (see below), whose sum is σ = 174939730625426. Its totient is φ = 80741414134800.

The previous prime is 121112121202201. The next prime is 121112121202273. The reversal of 121112121202209 is 902202121211121.

121112121202209 is a `hidden beast` number, since 1 + 21 + 112 + 121 + 202 + 209 = 666.

It can be written as a sum of positive squares in only one way, i.e., 118586872857600 + 2525248344609 = 10889760^2 + 1589103^2 .

It is not a de Polignac number, because 121112121202209 - 2³ = 121112121202201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121112121202201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6728451177892 + ... + 6728451177909.

Almost surely, 2^{121112121202209} is an apocalyptic number.

It is an amenable number.

121112121202209 is a deficient number, since it is larger than the sum of its proper divisors (53827609423217).

121112121202209 is a wasteful number, since it uses less digits than its factorization.

121112121202209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13456902355807 (or 13456902355804 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The spelling of 121112121202209 in words is "one hundred twenty-one trillion, one hundred twelve billion, one hundred twenty-one million, two hundred two thousand, two hundred nine".