21411212503 has 16 divisors (see below), whose sum is σ = 22235619744. Its totient is φ = 20600265600.

The previous prime is 21411212497. The next prime is 21411212507. The reversal of 21411212503 is 30521211412.

It is a cyclic number.

It is not a de Polignac number, because 21411212503 - 2²⁹ = 20874341591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411212507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3386301 + ... + 3392617.

It is an arithmetic number, because the mean of its divisors is an integer number (1389726234).

Almost surely, 2^21411212503 is an apocalyptic number.

21411212503 is a deficient number, since it is larger than the sum of its proper divisors (824407241).

21411212503 is a wasteful number, since it uses less digits than its factorization.

21411212503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7362.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 21411212503 its reverse (30521211412), we get a palindrome (51932423915).

The spelling of 21411212503 in words is "twenty-one billion, four hundred eleven million, two hundred twelve thousand, five hundred three".