220422421 has 2 divisors, whose sum is σ = 220422422. Its totient is φ = 220422420.

The previous prime is 220422413. The next prime is 220422443. The reversal of 220422421 is 124224022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197093521 + 23328900 = 14039^2 + 4830^2 .

It is a cyclic number.

It is not a de Polignac number, because 220422421 - 2³ = 220422413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220422491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110211210 + 110211211.

It is an arithmetic number, because the mean of its divisors is an integer number (110211211).

Almost surely, 2^220422421 is an apocalyptic number.

It is an amenable number.

220422421 is a deficient number, since it is larger than the sum of its proper divisors (1).

220422421 is an equidigital number, since it uses as much as digits as its factorization.

220422421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 220422421 is about 14846.6299543028. The cubic root of 220422421 is about 604.0672017461.

Adding to 220422421 its reverse (124224022), we get a palindrome (344646443).

The spelling of 220422421 in words is "two hundred twenty million, four hundred twenty-two thousand, four hundred twenty-one".