133997814721 has 2 divisors, whose sum is σ = 133997814722. Its totient is φ = 133997814720.

The previous prime is 133997814701. The next prime is 133997814893. The reversal of 133997814721 is 127418799331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111048897600 + 22948917121 = 333240^2 + 151489^2 .

It is a cyclic number.

It is not a de Polignac number, because 133997814721 - 2²⁵ = 133964260289 is a prime.

It is not a weakly prime, because it can be changed into another prime (133997814701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66998907360 + 66998907361.

It is an arithmetic number, because the mean of its divisors is an integer number (66998907361).

Almost surely, 2^133997814721 is an apocalyptic number.

It is an amenable number.

133997814721 is a deficient number, since it is larger than the sum of its proper divisors (1).

133997814721 is an equidigital number, since it uses as much as digits as its factorization.

133997814721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 55.

The spelling of 133997814721 in words is "one hundred thirty-three billion, nine hundred ninety-seven million, eight hundred fourteen thousand, seven hundred twenty-one".