21412099 has 2 divisors, whose sum is σ = 21412100. Its totient is φ = 21412098.

The previous prime is 21412093. The next prime is 21412123. The reversal of 21412099 is 99021412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21412099 - 2⁹ = 21411587 is a prime.

It is not a weakly prime, because it can be changed into another prime (21412093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10706049 + 10706050.

It is an arithmetic number, because the mean of its divisors is an integer number (10706050).

Almost surely, 2^21412099 is an apocalyptic number.

21412099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21412099 is an equidigital number, since it uses as much as digits as its factorization.

21412099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 21412099 is about 4627.3209311652. The cubic root of 21412099 is about 277.6854221622.

The spelling of 21412099 in words is "twenty-one million, four hundred twelve thousand, ninety-nine".