124204210422121 has 4 divisors (see below), whose sum is σ = 124834688647812. Its totient is φ = 123573732196432.

The previous prime is 124204210422107. The next prime is 124204210422191. The reversal of 124204210422121 is 121224012402421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67647252792025 + 56556957630096 = 8224795^2 + 7520436^2 .

It is a cyclic number.

It is not a de Polignac number, because 124204210422121 - 2¹³ = 124204210413929 is a prime.

It is a super-2 number, since 2×124204210422121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124204210422121.

It is not an unprimeable number, because it can be changed into a prime (124204210422191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315239112550 + ... + 315239112943.

It is an arithmetic number, because the mean of its divisors is an integer number (31208672161953).

Almost surely, 2^{124204210422121} is an apocalyptic number.

It is an amenable number.

124204210422121 is a deficient number, since it is larger than the sum of its proper divisors (630478225691).

124204210422121 is an equidigital number, since it uses as much as digits as its factorization.

124204210422121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630478225690.

The product of its (nonzero) digits is 4096, while the sum is 28.

Adding to 124204210422121 its reverse (121224012402421), we get a palindrome (245428222824542).

The spelling of 124204210422121 in words is "one hundred twenty-four trillion, two hundred four billion, two hundred ten million, four hundred twenty-two thousand, one hundred twenty-one".