132320821 has 2 divisors, whose sum is σ = 132320822. Its totient is φ = 132320820.

The previous prime is 132320767. The next prime is 132320833. The reversal of 132320821 is 128023231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126000625 + 6320196 = 11225^2 + 2514^2 .

It is a cyclic number.

It is not a de Polignac number, because 132320821 - 2²¹ = 130223669 is a prime.

It is a super-2 number, since 2×132320821² = 35017599340228082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 132320792 and 132320801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (132320861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66160410 + 66160411.

It is an arithmetic number, because the mean of its divisors is an integer number (66160411).

Almost surely, 2^132320821 is an apocalyptic number.

It is an amenable number.

132320821 is a deficient number, since it is larger than the sum of its proper divisors (1).

132320821 is an equidigital number, since it uses as much as digits as its factorization.

132320821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 132320821 is about 11503.0787617924. The cubic root of 132320821 is about 509.5765047715.

The spelling of 132320821 in words is "one hundred thirty-two million, three hundred twenty thousand, eight hundred twenty-one".