331201120300021 has 2 divisors, whose sum is σ = 331201120300022. Its totient is φ = 331201120300020.

The previous prime is 331201120300019. The next prime is 331201120300081. The reversal of 331201120300021 is 120003021102133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317687489964100 + 13513630335921 = 17823790^2 + 3676089^2 .

It is a cyclic number.

It is not a de Polignac number, because 331201120300021 - 2¹ = 331201120300019 is a prime.

Together with 331201120300019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331201120300081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165600560150010 + 165600560150011.

It is an arithmetic number, because the mean of its divisors is an integer number (165600560150011).

Almost surely, 2^{331201120300021} is an apocalyptic number.

It is an amenable number.

331201120300021 is a deficient number, since it is larger than the sum of its proper divisors (1).

331201120300021 is an equidigital number, since it uses as much as digits as its factorization.

331201120300021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 331201120300021 its reverse (120003021102133), we get a palindrome (451204141402154).

The spelling of 331201120300021 in words is "three hundred thirty-one trillion, two hundred one billion, one hundred twenty million, three hundred thousand, twenty-one".