220032232421 has 2 divisors, whose sum is σ = 220032232422. Its totient is φ = 220032232420.

The previous prime is 220032232369. The next prime is 220032232487. The reversal of 220032232421 is 124232230022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219947868196 + 84364225 = 468986^2 + 9185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220032232421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220032237421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110016116210 + 110016116211.

It is an arithmetic number, because the mean of its divisors is an integer number (110016116211).

Almost surely, 2^220032232421 is an apocalyptic number.

It is an amenable number.

220032232421 is a deficient number, since it is larger than the sum of its proper divisors (1).

220032232421 is an equidigital number, since it uses as much as digits as its factorization.

220032232421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 220032232421 its reverse (124232230022), we get a palindrome (344264462443).

The spelling of 220032232421 in words is "two hundred twenty billion, thirty-two million, two hundred thirty-two thousand, four hundred twenty-one".