4224123991 has 2 divisors, whose sum is σ = 4224123992. Its totient is φ = 4224123990.

The previous prime is 4224123989. The next prime is 4224124007. The reversal of 4224123991 is 1993214224.

4224123991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4224123991 - 2¹ = 4224123989 is a prime.

Together with 4224123989, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4224123991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4224123931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2112061995 + 2112061996.

It is an arithmetic number, because the mean of its divisors is an integer number (2112061996).

Almost surely, 2^4224123991 is an apocalyptic number.

4224123991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4224123991 is an equidigital number, since it uses as much as digits as its factorization.

4224123991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 4224123991 is about 64993.2611199038. The cubic root of 4224123991 is about 1616.5118249310.

The spelling of 4224123991 in words is "four billion, two hundred twenty-four million, one hundred twenty-three thousand, nine hundred ninety-one".