133056556564021 has 2 divisors, whose sum is σ = 133056556564022. Its totient is φ = 133056556564020.

The previous prime is 133056556563961. The next prime is 133056556564033. The reversal of 133056556564021 is 120465655650331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71892253944900 + 61164302619121 = 8478930^2 + 7820761^2 .

It is a cyclic number.

It is not a de Polignac number, because 133056556564021 - 2⁴³ = 124260463541813 is a prime.

It is a super-2 number, since 2×133056556564021² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133056556564021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133056556574021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66528278282010 + 66528278282011.

It is an arithmetic number, because the mean of its divisors is an integer number (66528278282011).

Almost surely, 2^{133056556564021} is an apocalyptic number.

It is an amenable number.

133056556564021 is a deficient number, since it is larger than the sum of its proper divisors (1).

133056556564021 is an equidigital number, since it uses as much as digits as its factorization.

133056556564021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720000, while the sum is 52.

The spelling of 133056556564021 in words is "one hundred thirty-three trillion, fifty-six billion, five hundred fifty-six million, five hundred sixty-four thousand, twenty-one".