21411421403 has 8 divisors (see below), whose sum is σ = 22104692736. Its totient is φ = 20718311400.

The previous prime is 21411421397. The next prime is 21411421411. The reversal of 21411421403 is 30412411412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21411421403 - 2¹⁰ = 21411420379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21411321403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266588 + ... + 337478.

It is an arithmetic number, because the mean of its divisors is an integer number (2763086592).

Almost surely, 2^21411421403 is an apocalyptic number.

21411421403 is a deficient number, since it is larger than the sum of its proper divisors (693271333).

21411421403 is an equidigital number, since it uses as much as digits as its factorization.

21411421403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80665.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21411421403 its reverse (30412411412), we get a palindrome (51823832815).

Subtracting 21411421403 from its reverse (30412411412), we obtain a palindrome (9000990009).

The spelling of 21411421403 in words is "twenty-one billion, four hundred eleven million, four hundred twenty-one thousand, four hundred three".