421222133 has 2 divisors, whose sum is σ = 421222134. Its totient is φ = 421222132.

The previous prime is 421222127. The next prime is 421222159. The reversal of 421222133 is 331222124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 323172529 + 98049604 = 17977^2 + 9902^2 .

It is a cyclic number.

It is not a de Polignac number, because 421222133 - 2¹² = 421218037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421222103) 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, 210611066 + 210611067.

It is an arithmetic number, because the mean of its divisors is an integer number (210611067).

Almost surely, 2^421222133 is an apocalyptic number.

It is an amenable number.

421222133 is a deficient number, since it is larger than the sum of its proper divisors (1).

421222133 is an equidigital number, since it uses as much as digits as its factorization.

421222133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 20.

The square root of 421222133 is about 20523.6968648438. The cubic root of 421222133 is about 749.6129161076.

Adding to 421222133 its reverse (331222124), we get a palindrome (752444257).

Subtracting from 421222133 its reverse (331222124), we obtain a palindrome (90000009).

The spelling of 421222133 in words is "four hundred twenty-one million, two hundred twenty-two thousand, one hundred thirty-three".