21441113 has 2 divisors, whose sum is σ = 21441114. Its totient is φ = 21441112.

The previous prime is 21441103. The next prime is 21441137. The reversal of 21441113 is 31114412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21270544 + 170569 = 4612^2 + 413^2 .

It is a cyclic number.

It is not a de Polignac number, because 21441113 - 2¹⁶ = 21375577 is a prime.

It is a Chen prime.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 21441091 and 21441100.

It is not a weakly prime, because it can be changed into another prime (21441103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720556 + 10720557.

It is an arithmetic number, because the mean of its divisors is an integer number (10720557).

Almost surely, 2^21441113 is an apocalyptic number.

It is an amenable number.

21441113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21441113 is an equidigital number, since it uses as much as digits as its factorization.

21441113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 17.

The square root of 21441113 is about 4630.4549452511. The cubic root of 21441113 is about 277.8107894219.

Adding to 21441113 its reverse (31114412), we get a palindrome (52555525).

The spelling of 21441113 in words is "twenty-one million, four hundred forty-one thousand, one hundred thirteen".