12021403 has 2 divisors, whose sum is σ = 12021404. Its totient is φ = 12021402.

The previous prime is 12021367. The next prime is 12021473. The reversal of 12021403 is 30412021.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021403 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010701 + 6010702.

It is an arithmetic number, because the mean of its divisors is an integer number (6010702).

Almost surely, 2^12021403 is an apocalyptic number.

12021403 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021403 is an equidigital number, since it uses as much as digits as its factorization.

12021403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12021403 is about 3467.1894958309. The cubic root of 12021403 is about 229.0788805508.

Adding to 12021403 its reverse (30412021), we get a palindrome (42433424).

The spelling of 12021403 in words is "twelve million, twenty-one thousand, four hundred three".