21234299 has 2 divisors, whose sum is σ = 21234300. Its totient is φ = 21234298.

The previous prime is 21234281. The next prime is 21234307. The reversal of 21234299 is 99243212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21234299 - 2¹² = 21230203 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21234209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617149 + 10617150.

It is an arithmetic number, because the mean of its divisors is an integer number (10617150).

Almost surely, 2^21234299 is an apocalyptic number.

21234299 is a deficient number, since it is larger than the sum of its proper divisors (1).

21234299 is an equidigital number, since it uses as much as digits as its factorization.

21234299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 21234299 is about 4608.0689013946. The cubic root of 21234299 is about 276.9146778534.

The spelling of 21234299 in words is "twenty-one million, two hundred thirty-four thousand, two hundred ninety-nine".