2202420421 has 2 divisors, whose sum is σ = 2202420422. Its totient is φ = 2202420420.

The previous prime is 2202420413. The next prime is 2202420463. The reversal of 2202420421 is 1240242022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1921857921 + 280562500 = 43839^2 + 16750^2 .

It is a cyclic number.

It is not a de Polignac number, because 2202420421 - 2³ = 2202420413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2202420481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1101210210 + 1101210211.

It is an arithmetic number, because the mean of its divisors is an integer number (1101210211).

Almost surely, 2^2202420421 is an apocalyptic number.

It is an amenable number.

2202420421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2202420421 is an equidigital number, since it uses as much as digits as its factorization.

2202420421 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 2202420421 is about 46929.9522799672. The cubic root of 2202420421 is about 1301.0682385326.

Adding to 2202420421 its reverse (1240242022), we get a palindrome (3442662443).

The spelling of 2202420421 in words is "two billion, two hundred two million, four hundred twenty thousand, four hundred twenty-one".