133319966447621 has 2 divisors, whose sum is σ = 133319966447622. Its totient is φ = 133319966447620.

The previous prime is 133319966447539. The next prime is 133319966447639. The reversal of 133319966447621 is 126744669913331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132192736200100 + 1127230247521 = 11497510^2 + 1061711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133319966447621 is a prime.

It is a super-3 number, since 3×133319966447621³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133319966447221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66659983223810 + 66659983223811.

It is an arithmetic number, because the mean of its divisors is an integer number (66659983223811).

Almost surely, 2^{133319966447621} is an apocalyptic number.

It is an amenable number.

133319966447621 is a deficient number, since it is larger than the sum of its proper divisors (1).

133319966447621 is an equidigital number, since it uses as much as digits as its factorization.

133319966447621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105815808, while the sum is 65.

The spelling of 133319966447621 in words is "one hundred thirty-three trillion, three hundred nineteen billion, nine hundred sixty-six million, four hundred forty-seven thousand, six hundred twenty-one".