331212133221 has 8 divisors (see below), whose sum is σ = 443835355200. Its totient is φ = 219698500032.

The previous prime is 331212133211. The next prime is 331212133223. The reversal of 331212133221 is 122331212133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 331212133221 - 2²² = 331207938917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 331212133191 and 331212133200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331212133223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277396500 + ... + 277397693.

It is an arithmetic number, because the mean of its divisors is an integer number (55479419400).

Almost surely, 2^331212133221 is an apocalyptic number.

It is an amenable number.

331212133221 is a deficient number, since it is larger than the sum of its proper divisors (112623221979).

331212133221 is a wasteful number, since it uses less digits than its factorization.

331212133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554794395.

The product of its digits is 1296, while the sum is 24.

Adding to 331212133221 its reverse (122331212133), we get a palindrome (453543345354).

The spelling of 331212133221 in words is "three hundred thirty-one billion, two hundred twelve million, one hundred thirty-three thousand, two hundred twenty-one".