21141233 has 2 divisors, whose sum is σ = 21141234. Its totient is φ = 21141232.

The previous prime is 21141227. The next prime is 21141257. The reversal of 21141233 is 33214112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17875984 + 3265249 = 4228^2 + 1807^2 .

It is a cyclic number.

It is not a de Polignac number, because 21141233 - 2¹⁶ = 21075697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21141733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570616 + 10570617.

It is an arithmetic number, because the mean of its divisors is an integer number (10570617).

Almost surely, 2^21141233 is an apocalyptic number.

It is an amenable number.

21141233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141233 is an equidigital number, since it uses as much as digits as its factorization.

21141233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 17.

The square root of 21141233 is about 4597.9596561953. The cubic root of 21141233 is about 276.5095301301.

Adding to 21141233 its reverse (33214112), we get a palindrome (54355345).

The spelling of 21141233 in words is "twenty-one million, one hundred forty-one thousand, two hundred thirty-three".