21122341 has 4 divisors (see below), whose sum is σ = 21132684. Its totient is φ = 21112000.

The previous prime is 21122323. The next prime is 21122351. The reversal of 21122341 is 14322112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6145441 + 14976900 = 2479^2 + 3870^2 .

It is a cyclic number.

It is not a de Polignac number, because 21122341 - 2¹⁵ = 21089573 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 (21122351) 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, 970 + ... + 6571.

It is an arithmetic number, because the mean of its divisors is an integer number (5283171).

Almost surely, 2^21122341 is an apocalyptic number.

It is an amenable number.

21122341 is a deficient number, since it is larger than the sum of its proper divisors (10343).

21122341 is an equidigital number, since it uses as much as digits as its factorization.

21122341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10342.

The product of its digits is 96, while the sum is 16.

The square root of 21122341 is about 4595.9048075433. The cubic root of 21122341 is about 276.4271417655.

Adding to 21122341 its reverse (14322112), we get a palindrome (35444453).

The spelling of 21122341 in words is "twenty-one million, one hundred twenty-two thousand, three hundred forty-one".