121200222218 has 8 divisors (see below), whose sum is σ = 182742304548. Its totient is φ = 60286120704.

The previous prime is 121200222211. The next prime is 121200222223. The reversal of 121200222218 is 812222002121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 116098977289 + 5101244929 = 340733^2 + 71423^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121200222193 and 121200222202.

It is not an unprimeable number, because it can be changed into a prime (121200222211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156994721 + ... + 156995492.

Almost surely, 2^121200222218 is an apocalyptic number.

121200222218 is a deficient number, since it is larger than the sum of its proper divisors (61542082330).

121200222218 is a wasteful number, since it uses less digits than its factorization.

121200222218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313990408.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 121200222218 its reverse (812222002121), we get a palindrome (933422224339).

The spelling of 121200222218 in words is "one hundred twenty-one billion, two hundred million, two hundred twenty-two thousand, two hundred eighteen".