133121179661 has 2 divisors, whose sum is σ = 133121179662. Its totient is φ = 133121179660.

The previous prime is 133121179649. The next prime is 133121179669. The reversal of 133121179661 is 166971121331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80945940100 + 52175239561 = 284510^2 + 228419^2 .

It is a cyclic number.

It is not a de Polignac number, because 133121179661 - 2²⁶ = 133054070797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133121179669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66560589830 + 66560589831.

It is an arithmetic number, because the mean of its divisors is an integer number (66560589831).

Almost surely, 2^133121179661 is an apocalyptic number.

It is an amenable number.

133121179661 is a deficient number, since it is larger than the sum of its proper divisors (1).

133121179661 is an equidigital number, since it uses as much as digits as its factorization.

133121179661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 41.

The spelling of 133121179661 in words is "one hundred thirty-three billion, one hundred twenty-one million, one hundred seventy-nine thousand, six hundred sixty-one".