421222231 has 2 divisors, whose sum is σ = 421222232. Its totient is φ = 421222230.

The previous prime is 421222213. The next prime is 421222271. The reversal of 421222231 is 132222124.

Together with previous prime (421222213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421222231 - 2⁷ = 421222103 is a prime.

It is a super-2 number, since 2×421222231² = 354856335777234722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421222199 and 421222208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421222271) 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, 210611115 + 210611116.

It is an arithmetic number, because the mean of its divisors is an integer number (210611116).

Almost surely, 2^421222231 is an apocalyptic number.

421222231 is a deficient number, since it is larger than the sum of its proper divisors (1).

421222231 is an equidigital number, since it uses as much as digits as its factorization.

421222231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 19.

The square root of 421222231 is about 20523.6992523278. The cubic root of 421222231 is about 749.6129742417.

Adding to 421222231 its reverse (132222124), we get a palindrome (553444355).

It can be divided in two parts, 4212222 and 31, that added together give a triangular number (4212253 = T₂₉₀₂).

The spelling of 421222231 in words is "four hundred twenty-one million, two hundred twenty-two thousand, two hundred thirty-one".