21122383 has 2 divisors, whose sum is σ = 21122384. Its totient is φ = 21122382.

The previous prime is 21122363. The next prime is 21122393. The reversal of 21122383 is 38322112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21122383 - 2⁵ = 21122351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21122323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561191 + 10561192.

It is an arithmetic number, because the mean of its divisors is an integer number (10561192).

Almost surely, 2^21122383 is an apocalyptic number.

21122383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122383 is an equidigital number, since it uses as much as digits as its factorization.

21122383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

The square root of 21122383 is about 4595.9093768263. The cubic root of 21122383 is about 276.4273249828.

Adding to 21122383 its reverse (38322112), we get a palindrome (59444495).

The spelling of 21122383 in words is "twenty-one million, one hundred twenty-two thousand, three hundred eighty-three".