331121223210121 has 2 divisors, whose sum is σ = 331121223210122. Its totient is φ = 331121223210120.

The previous prime is 331121223210097. The next prime is 331121223210149. The reversal of 331121223210121 is 121012322121133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325614410054521 + 5506813155600 = 18044789^2 + 2346660^2 .

It is a cyclic number.

It is not a de Polignac number, because 331121223210121 - 2¹¹ = 331121223208073 is a prime.

It is not a weakly prime, because it can be changed into another prime (331121223214121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165560611605060 + 165560611605061.

It is an arithmetic number, because the mean of its divisors is an integer number (165560611605061).

Almost surely, 2^{331121223210121} is an apocalyptic number.

It is an amenable number.

331121223210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

331121223210121 is an equidigital number, since it uses as much as digits as its factorization.

331121223210121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 331121223210121 its reverse (121012322121133), we get a palindrome (452133545331254).

The spelling of 331121223210121 in words is "three hundred thirty-one trillion, one hundred twenty-one billion, two hundred twenty-three million, two hundred ten thousand, one hundred twenty-one".