133303201021 has 2 divisors, whose sum is σ = 133303201022. Its totient is φ = 133303201020.

The previous prime is 133303201019. The next prime is 133303201033. The reversal of 133303201021 is 120102303331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132504008121 + 799192900 = 364011^2 + 28270^2 .

It is a cyclic number.

It is not a de Polignac number, because 133303201021 - 2¹ = 133303201019 is a prime.

Together with 133303201019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 133303201021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133303201001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66651600510 + 66651600511.

It is an arithmetic number, because the mean of its divisors is an integer number (66651600511).

Almost surely, 2^133303201021 is an apocalyptic number.

It is an amenable number.

133303201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

133303201021 is an equidigital number, since it uses as much as digits as its factorization.

133303201021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 133303201021 its reverse (120102303331), we get a palindrome (253405504352).

The spelling of 133303201021 in words is "one hundred thirty-three billion, three hundred three million, two hundred one thousand, twenty-one".