331220033220121 has 16 divisors (see below), whose sum is σ = 340581925167120. Its totient is φ = 321879950807040.

The previous prime is 331220033220067. The next prime is 331220033220157. The reversal of 331220033220121 is 121022330022133.

It can be written as a sum of positive squares in 8 ways, for example, as 40187180920896 + 291032852299225 = 6339336^2 + 17059685^2 .

It is not a de Polignac number, because 331220033220121 - 2⁹ = 331220033219609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331220033220721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101911615 + ... + 105111451.

It is an arithmetic number, because the mean of its divisors is an integer number (21286370322945).

Almost surely, 2^{331220033220121} is an apocalyptic number.

It is an amenable number.

331220033220121 is a deficient number, since it is larger than the sum of its proper divisors (9361891946999).

331220033220121 is a wasteful number, since it uses less digits than its factorization.

331220033220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203244.

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

Adding to 331220033220121 its reverse (121022330022133), we get a palindrome (452242363242254).

The spelling of 331220033220121 in words is "three hundred thirty-one trillion, two hundred twenty billion, thirty-three million, two hundred twenty thousand, one hundred twenty-one".