121200232221 has 24 divisors (see below), whose sum is σ = 176151096576. Its totient is φ = 80300188320.

The previous prime is 121200232217. The next prime is 121200232273. The reversal of 121200232221 is 122232002121.

121200232221 is a `hidden beast` number, since 1 + 212 + 0 + 0 + 232 + 221 = 666.

It is not a de Polignac number, because 121200232221 - 2² = 121200232217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121200232194 and 121200232203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200232421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4131676 + ... + 4160906.

It is an arithmetic number, because the mean of its divisors is an integer number (7339629024).

Almost surely, 2^121200232221 is an apocalyptic number.

It is an amenable number.

121200232221 is a deficient number, since it is larger than the sum of its proper divisors (54950864355).

121200232221 is a wasteful number, since it uses less digits than its factorization.

121200232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32073 (or 32070 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 121200232221 its reverse (122232002121), we get a palindrome (243432234342).

The spelling of 121200232221 in words is "one hundred twenty-one billion, two hundred million, two hundred thirty-two thousand, two hundred twenty-one".