21412240203 has 8 divisors (see below), whose sum is σ = 28693120000. Its totient is φ = 14203093608.

The previous prime is 21412240189. The next prime is 21412240211. The reversal of 21412240203 is 30204221412.

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

It is not a de Polignac number, because 21412240203 - 2⁹ = 21412239691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21412240203.

It is not an unprimeable number, because it can be changed into a prime (21412240253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17932603 + ... + 17933796.

It is an arithmetic number, because the mean of its divisors is an integer number (3586640000).

Almost surely, 2^21412240203 is an apocalyptic number.

21412240203 is a deficient number, since it is larger than the sum of its proper divisors (7280879797).

21412240203 is a wasteful number, since it uses less digits than its factorization.

21412240203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35866601.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21412240203 its reverse (30204221412), we get a palindrome (51616461615).

The spelling of 21412240203 in words is "twenty-one billion, four hundred twelve million, two hundred forty thousand, two hundred three".