4221020231 has 2 divisors, whose sum is σ = 4221020232. Its totient is φ = 4221020230.

The previous prime is 4221020213. The next prime is 4221020249. The reversal of 4221020231 is 1320201224.

Together with previous prime (4221020213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (4221020213) and next prime (4221020249).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4221020231 is a prime.

It is a super-2 number, since 2×4221020231² = 35634023581022586722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221020201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110510115 + 2110510116.

It is an arithmetic number, because the mean of its divisors is an integer number (2110510116).

Almost surely, 2^4221020231 is an apocalyptic number.

4221020231 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221020231 is an equidigital number, since it uses as much as digits as its factorization.

4221020231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 4221020231 is about 64969.3791797336. The cubic root of 4221020231 is about 1616.1158064034.

Adding to 4221020231 its reverse (1320201224), we get a palindrome (5541221455).

The spelling of 4221020231 in words is "four billion, two hundred twenty-one million, twenty thousand, two hundred thirty-one".