21332141 has 2 divisors, whose sum is σ = 21332142. Its totient is φ = 21332140.

The previous prime is 21332119. The next prime is 21332153. The reversal of 21332141 is 14123312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19616041 + 1716100 = 4429^2 + 1310^2 .

It is a cyclic number.

It is not a de Polignac number, because 21332141 - 2²² = 17137837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21335141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666070 + 10666071.

It is an arithmetic number, because the mean of its divisors is an integer number (10666071).

Almost surely, 2^21332141 is an apocalyptic number.

It is an amenable number.

21332141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332141 is an equidigital number, since it uses as much as digits as its factorization.

21332141 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 21332141 is about 4618.6730778439. The cubic root of 21332141 is about 277.3393426580.

Adding to 21332141 its reverse (14123312), we get a palindrome (35455453).

The spelling of 21332141 in words is "twenty-one million, three hundred thirty-two thousand, one hundred forty-one".