133210013321621 has 2 divisors, whose sum is σ = 133210013321622. Its totient is φ = 133210013321620.

The previous prime is 133210013321563. The next prime is 133210013321629. The reversal of 133210013321621 is 126123310012331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76061160903025 + 57148852418596 = 8721305^2 + 7559686^2 .

It is a cyclic number.

It is not a de Polignac number, because 133210013321621 - 2²² = 133210009127317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133210013321629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66605006660810 + 66605006660811.

It is an arithmetic number, because the mean of its divisors is an integer number (66605006660811).

Almost surely, 2^{133210013321621} is an apocalyptic number.

It is an amenable number.

133210013321621 is a deficient number, since it is larger than the sum of its proper divisors (1).

133210013321621 is an equidigital number, since it uses as much as digits as its factorization.

133210013321621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

Adding to 133210013321621 its reverse (126123310012331), we get a palindrome (259333323333952).

The spelling of 133210013321621 in words is "one hundred thirty-three trillion, two hundred ten billion, thirteen million, three hundred twenty-one thousand, six hundred twenty-one".