12421099 has 2 divisors, whose sum is σ = 12421100. Its totient is φ = 12421098.

The previous prime is 12421061. The next prime is 12421103. The reversal of 12421099 is 99012421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12421099 - 2¹⁹ = 11896811 is a prime.

It is not a weakly prime, because it can be changed into another prime (12421009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210549 + 6210550.

It is an arithmetic number, because the mean of its divisors is an integer number (6210550).

Almost surely, 2^12421099 is an apocalyptic number.

12421099 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421099 is an equidigital number, since it uses as much as digits as its factorization.

12421099 is an evil number, because the sum of its binary digits is even.

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

The square root of 12421099 is about 3524.3579557134. The cubic root of 12421099 is about 231.5901093295.

It can be divided in two parts, 1 and 2421099, that added together give a triangular number (2421100 = T₂₂₀₀).

The spelling of 12421099 in words is "twelve million, four hundred twenty-one thousand, ninety-nine".