132320021 has 2 divisors, whose sum is σ = 132320022. Its totient is φ = 132320020.

The previous prime is 132320003. The next prime is 132320053. The reversal of 132320021 is 120023231.

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., 90459121 + 41860900 = 9511^2 + 6470^2 .

It is an emirp because it is prime and its reverse (120023231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-132320021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 132319978 and 132320005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (132320521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66160010 + 66160011.

It is an arithmetic number, because the mean of its divisors is an integer number (66160011).

Almost surely, 2^132320021 is an apocalyptic number.

It is an amenable number.

132320021 is a deficient number, since it is larger than the sum of its proper divisors (1).

132320021 is an equidigital number, since it uses as much as digits as its factorization.

132320021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 132320021 is about 11503.0439884406. The cubic root of 132320021 is about 509.5754778179.

Adding to 132320021 its reverse (120023231), we get a palindrome (252343252).

The spelling of 132320021 in words is "one hundred thirty-two million, three hundred twenty thousand, twenty-one".