132161221 has 2 divisors, whose sum is σ = 132161222. Its totient is φ = 132161220.

The previous prime is 132161219. The next prime is 132161251. The reversal of 132161221 is 122161231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90041121 + 42120100 = 9489^2 + 6490^2 .

It is a cyclic number.

It is not a de Polignac number, because 132161221 - 2¹ = 132161219 is a prime.

Together with 132161219, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (132161251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66080610 + 66080611.

It is an arithmetic number, because the mean of its divisors is an integer number (66080611).

Almost surely, 2^132161221 is an apocalyptic number.

It is an amenable number.

132161221 is a deficient number, since it is larger than the sum of its proper divisors (1).

132161221 is an equidigital number, since it uses as much as digits as its factorization.

132161221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

The square root of 132161221 is about 11496.1393954666. The cubic root of 132161221 is about 509.3715455171.

The spelling of 132161221 in words is "one hundred thirty-two million, one hundred sixty-one thousand, two hundred twenty-one".