4124123201221 has 2 divisors, whose sum is σ = 4124123201222. Its totient is φ = 4124123201220.

The previous prime is 4124123201203. The next prime is 4124123201257. The reversal of 4124123201221 is 1221023214214.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3153060770596 + 971062430625 = 1775686^2 + 985425^2 .

It is a cyclic number.

It is not a de Polignac number, because 4124123201221 - 2⁵ = 4124123201189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4124123201921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2062061600610 + 2062061600611.

It is an arithmetic number, because the mean of its divisors is an integer number (2062061600611).

Almost surely, 2^{4124123201221} is an apocalyptic number.

It is an amenable number.

4124123201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4124123201221 is an equidigital number, since it uses as much as digits as its factorization.

4124123201221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 4124123201221 its reverse (1221023214214), we get a palindrome (5345146415435).

The spelling of 4124123201221 in words is "four trillion, one hundred twenty-four billion, one hundred twenty-three million, two hundred one thousand, two hundred twenty-one".