121200200200001 has 6 divisors (see below), whose sum is σ = 131240453471190. Its totient is φ = 111877107876768.

The previous prime is 121200200199977. The next prime is 121200200200021. The reversal of 121200200200001 is 100002002002121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2395759134976 + 118804441065025 = 1547824^2 + 10899745^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121200200200001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121200200200021) 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, 358580473796 + ... + 358580474133.

It is an arithmetic number, because the mean of its divisors is an integer number (21873408911865).

Almost surely, 2^{121200200200001} is an apocalyptic number.

It is an amenable number.

121200200200001 is a deficient number, since it is larger than the sum of its proper divisors (10040253271189).

121200200200001 is an equidigital number, since it uses as much as digits as its factorization.

121200200200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717160947955 (or 717160947942 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121200200200001 its reverse (100002002002121), we get a palindrome (221202202202122).

The spelling of 121200200200001 in words is "one hundred twenty-one trillion, two hundred billion, two hundred million, two hundred thousand, one".