121200012121209 has 16 divisors (see below), whose sum is σ = 184685919685632. Its totient is φ = 69257079685008.

The previous prime is 121200012121183. The next prime is 121200012121261. The reversal of 121200012121209 is 902121210002121.

It is not a de Polignac number, because 121200012121209 - 2¹¹ = 121200012119161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121200012121109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24160692 + ... + 28742634.

It is an arithmetic number, because the mean of its divisors is an integer number (11542869980352).

Almost surely, 2^{121200012121209} is an apocalyptic number.

It is an amenable number.

121200012121209 is a deficient number, since it is larger than the sum of its proper divisors (63485907564423).

121200012121209 is a wasteful number, since it uses less digits than its factorization.

121200012121209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5841556.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 121200012121209 in words is "one hundred twenty-one trillion, two hundred billion, twelve million, one hundred twenty-one thousand, two hundred nine".