331332212221 has 4 divisors (see below), whose sum is σ = 331565054272. Its totient is φ = 331099370172.

The previous prime is 331332212203. The next prime is 331332212231. The reversal of 331332212221 is 122212233133.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122212233133 = 10459 ⋅11684887.

It is a cyclic number.

It is not a de Polignac number, because 331332212221 - 2⁷ = 331332212093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331332212231) 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, 116418891 + ... + 116421736.

It is an arithmetic number, because the mean of its divisors is an integer number (82891263568).

Almost surely, 2^331332212221 is an apocalyptic number.

It is an amenable number.

331332212221 is a deficient number, since it is larger than the sum of its proper divisors (232842051).

331332212221 is a wasteful number, since it uses less digits than its factorization.

331332212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232842050.

The product of its digits is 2592, while the sum is 25.

Adding to 331332212221 its reverse (122212233133), we get a palindrome (453544445354).

The spelling of 331332212221 in words is "three hundred thirty-one billion, three hundred thirty-two million, two hundred twelve thousand, two hundred twenty-one".