21122183 has 2 divisors, whose sum is σ = 21122184. Its totient is φ = 21122182.

The previous prime is 21122161. The next prime is 21122197. The reversal of 21122183 is 38122112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122183 is a prime.

It is a super-2 number, since 2×21122183² = 892293229370978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21122383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561091 + 10561092.

It is an arithmetic number, because the mean of its divisors is an integer number (10561092).

Almost surely, 2^21122183 is an apocalyptic number.

21122183 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122183 is an equidigital number, since it uses as much as digits as its factorization.

21122183 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 20.

The square root of 21122183 is about 4595.8876182953. The cubic root of 21122183 is about 276.4264525175.

Adding to 21122183 its reverse (38122112), we get a palindrome (59244295).

The spelling of 21122183 in words is "twenty-one million, one hundred twenty-two thousand, one hundred eighty-three".