21122301 has 16 divisors (see below), whose sum is σ = 29153600. Its totient is φ = 13602384.

The previous prime is 21122291. The next prime is 21122323. The reversal of 21122301 is 10322112.

It is not a de Polignac number, because 21122301 - 2¹⁰ = 21121277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151890 + ... + 152028.

It is an arithmetic number, because the mean of its divisors is an integer number (1822100).

Almost surely, 2^21122301 is an apocalyptic number.

It is an amenable number.

21122301 is a deficient number, since it is larger than the sum of its proper divisors (8031299).

21122301 is an frugal number, since it uses more digits than its factorization.

21122301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21122301 is about 4595.9004558411. The cubic root of 21122301 is about 276.4269672727.

Adding to 21122301 its reverse (10322112), we get a palindrome (31444413).

The spelling of 21122301 in words is "twenty-one million, one hundred twenty-two thousand, three hundred one".