220132121221 has 2 divisors, whose sum is σ = 220132121222. Its totient is φ = 220132121220.

The previous prime is 220132121201. The next prime is 220132121233. The reversal of 220132121221 is 122121231022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157374857025 + 62757264196 = 396705^2 + 250514^2 .

It is a cyclic number.

It is not a de Polignac number, because 220132121221 - 2¹³ = 220132113029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220132121201) 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, 110066060610 + 110066060611.

It is an arithmetic number, because the mean of its divisors is an integer number (110066060611).

Almost surely, 2^220132121221 is an apocalyptic number.

It is an amenable number.

220132121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

220132121221 is an equidigital number, since it uses as much as digits as its factorization.

220132121221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 220132121221 its reverse (122121231022), we get a palindrome (342253352243).

The spelling of 220132121221 in words is "two hundred twenty billion, one hundred thirty-two million, one hundred twenty-one thousand, two hundred twenty-one".