4122510221 has 4 divisors (see below), whose sum is σ = 4124941212. Its totient is φ = 4120079232.

The previous prime is 4122510211. The next prime is 4122510257. The reversal of 4122510221 is 1220152214.

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 3883034596 + 239475625 = 62314^2 + 15475^2 .

It is a cyclic number.

It is not a de Polignac number, because 4122510221 - 2²² = 4118315917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4122510193 and 4122510202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4122510211) 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, 1212950 + ... + 1216343.

It is an arithmetic number, because the mean of its divisors is an integer number (1031235303).

Almost surely, 2^4122510221 is an apocalyptic number.

It is an amenable number.

4122510221 is a deficient number, since it is larger than the sum of its proper divisors (2430991).

4122510221 is a wasteful number, since it uses less digits than its factorization.

4122510221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430990.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 4122510221 is about 64206.7770644190. Note that the first 3 decimals coincide. The cubic root of 4122510221 is about 1603.4444313048. Note that the first 4 decimals are identical.

Adding to 4122510221 its reverse (1220152214), we get a palindrome (5342662435).

The spelling of 4122510221 in words is "four billion, one hundred twenty-two million, five hundred ten thousand, two hundred twenty-one".