121331203221 has 32 divisors (see below), whose sum is σ = 165408186240. Its totient is φ = 79091251200.

The previous prime is 121331203163. The next prime is 121331203243. The reversal of 121331203221 is 122302133121.

It is not a de Polignac number, because 121331203221 - 2⁶ = 121331203157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121331203291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46503565 + ... + 46506173.

It is an arithmetic number, because the mean of its divisors is an integer number (5169005820).

Almost surely, 2^121331203221 is an apocalyptic number.

It is an amenable number.

121331203221 is a deficient number, since it is larger than the sum of its proper divisors (44076983019).

121331203221 is a wasteful number, since it uses less digits than its factorization.

121331203221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4437.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 121331203221 its reverse (122302133121), we get a palindrome (243633336342).

The spelling of 121331203221 in words is "one hundred twenty-one billion, three hundred thirty-one million, two hundred three thousand, two hundred twenty-one".