331220203333121 has 4 divisors (see below), whose sum is σ = 331347939627012. Its totient is φ = 331092467039232.

The previous prime is 331220203333111. The next prime is 331220203333141. The reversal of 331220203333121 is 121333302022133.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 194164855833025 + 137055347500096 = 13934305^2 + 11707064^2 .

It is a cyclic number.

It is not a de Polignac number, because 331220203333121 - 2¹⁰ = 331220203332097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331220203333111) 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, 63868143056 + ... + 63868148241.

It is an arithmetic number, because the mean of its divisors is an integer number (82836984906753).

Almost surely, 2^{331220203333121} is an apocalyptic number.

It is an amenable number.

331220203333121 is a deficient number, since it is larger than the sum of its proper divisors (127736293891).

331220203333121 is a wasteful number, since it uses less digits than its factorization.

331220203333121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127736293890.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 331220203333121 its reverse (121333302022133), we get a palindrome (452553505355254).

The spelling of 331220203333121 in words is "three hundred thirty-one trillion, two hundred twenty billion, two hundred three million, three hundred thirty-three thousand, one hundred twenty-one".