331220210033221 has 8 divisors (see below), whose sum is σ = 331503241862520. Its totient is φ = 330937239041472.

The previous prime is 331220210033149. The next prime is 331220210033257. The reversal of 331220210033221 is 122330012022133.

It can be written as a sum of positive squares in 4 ways, for example, as 83110772813121 + 248109437220100 = 9116511^2 + 15751490^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 331220210033221 - 2¹⁵ = 331220210000453 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 (331220210063221) 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, 4312726 + ... + 26096743.

It is an arithmetic number, because the mean of its divisors is an integer number (41437905232815).

Almost surely, 2^{331220210033221} is an apocalyptic number.

It is an amenable number.

331220210033221 is a deficient number, since it is larger than the sum of its proper divisors (283031829299).

331220210033221 is a wasteful number, since it uses less digits than its factorization.

331220210033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30418775.

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

Adding to 331220210033221 its reverse (122330012022133), we get a palindrome (453550222055354).

The spelling of 331220210033221 in words is "three hundred thirty-one trillion, two hundred twenty billion, two hundred ten million, thirty-three thousand, two hundred twenty-one".