132121221 has 4 divisors (see below), whose sum is σ = 176161632. Its totient is φ = 88080812.

The previous prime is 132121207. The next prime is 132121271. The reversal of 132121221 is 122121231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122121231 = 3 ⋅40707077.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-132121221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 132121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132121201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22020201 + ... + 22020206.

It is an arithmetic number, because the mean of its divisors is an integer number (44040408).

Almost surely, 2^132121221 is an apocalyptic number.

It is an amenable number.

132121221 is a deficient number, since it is larger than the sum of its proper divisors (44040411).

132121221 is an equidigital number, since it uses as much as digits as its factorization.

132121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44040410.

The product of its digits is 48, while the sum is 15.

The square root of 132121221 is about 11494.3995493458. The cubic root of 132121221 is about 509.3201514254.

Adding to 132121221 its reverse (122121231), we get a palindrome (254242452).

The spelling of 132121221 in words is "one hundred thirty-two million, one hundred twenty-one thousand, two hundred twenty-one".