124122204221 has 4 divisors (see below), whose sum is σ = 124128924444. Its totient is φ = 124115484000.

The previous prime is 124122204187. The next prime is 124122204223. The reversal of 124122204221 is 122402221421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122402221421 = 4423 ⋅27674027.

It can be written as a sum of positive squares in 2 ways, for example, as 118164062500 + 5958141721 = 343750^2 + 77189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124122204221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124122204223) 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 in 3 ways as a sum of consecutive naturals, for example, 3332330 + ... + 3369371.

It is an arithmetic number, because the mean of its divisors is an integer number (31032231111).

Almost surely, 2^124122204221 is an apocalyptic number.

It is an amenable number.

124122204221 is a deficient number, since it is larger than the sum of its proper divisors (6720223).

124122204221 is an equidigital number, since it uses as much as digits as its factorization.

124122204221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6720222.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 124122204221 its reverse (122402221421), we get a palindrome (246524425642).

The spelling of 124122204221 in words is "one hundred twenty-four billion, one hundred twenty-two million, two hundred four thousand, two hundred twenty-one".