331221230332121 has 4 divisors (see below), whose sum is σ = 331221565676544. Its totient is φ = 331220894987700.

The previous prime is 331221230332061. The next prime is 331221230332159. The reversal of 331221230332121 is 121233032122133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 331221230332121 - 2¹⁰ = 331221230331097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331221230932121) 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, 166186265 + ... + 168167526.

It is an arithmetic number, because the mean of its divisors is an integer number (82805391419136).

Almost surely, 2^{331221230332121} is an apocalyptic number.

It is an amenable number.

331221230332121 is a deficient number, since it is larger than the sum of its proper divisors (335344423).

331221230332121 is an equidigital number, since it uses as much as digits as its factorization.

331221230332121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335344422.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 331221230332121 its reverse (121233032122133), we get a palindrome (452454262454254).

The spelling of 331221230332121 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, two hundred thirty million, three hundred thirty-two thousand, one hundred twenty-one".