133634255161021 has 2 divisors, whose sum is σ = 133634255161022. Its totient is φ = 133634255161020.

The previous prime is 133634255161003. The next prime is 133634255161027. The reversal of 133634255161021 is 120161552436331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133587109724121 + 47145436900 = 11557989^2 + 217130^2 .

It is a cyclic number.

It is not a de Polignac number, because 133634255161021 - 2⁷ = 133634255160893 is a prime.

It is a super-2 number, since 2×133634255161021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133634255161027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66817127580510 + 66817127580511.

It is an arithmetic number, because the mean of its divisors is an integer number (66817127580511).

Almost surely, 2^{133634255161021} is an apocalyptic number.

It is an amenable number.

133634255161021 is a deficient number, since it is larger than the sum of its proper divisors (1).

133634255161021 is an equidigital number, since it uses as much as digits as its factorization.

133634255161021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 133634255161021 in words is "one hundred thirty-three trillion, six hundred thirty-four billion, two hundred fifty-five million, one hundred sixty-one thousand, twenty-one".