4231043221 has 2 divisors, whose sum is σ = 4231043222. Its totient is φ = 4231043220.

The previous prime is 4231043197. The next prime is 4231043231. The reversal of 4231043221 is 1223401324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4226820196 + 4223025 = 65014^2 + 2055^2 .

It is a cyclic number.

It is not a de Polignac number, because 4231043221 - 2²³ = 4222654613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4231043192 and 4231043201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4231043231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2115521610 + 2115521611.

It is an arithmetic number, because the mean of its divisors is an integer number (2115521611).

Almost surely, 2^4231043221 is an apocalyptic number.

It is an amenable number.

4231043221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4231043221 is an equidigital number, since it uses as much as digits as its factorization.

4231043221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 4231043221 is about 65046.4697043583. The cubic root of 4231043221 is about 1617.3939735586.

Adding to 4231043221 its reverse (1223401324), we get a palindrome (5454444545).

The spelling of 4231043221 in words is "four billion, two hundred thirty-one million, forty-three thousand, two hundred twenty-one".