21311421203 has 8 divisors (see below), whose sum is σ = 21621437040. Its totient is φ = 21003644160.

The previous prime is 21311421161. The next prime is 21311421349. The reversal of 21311421203 is 30212411312.

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 21311421203 - 2¹⁴ = 21311404819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21311420203) 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, 540518 + ... + 578603.

It is an arithmetic number, because the mean of its divisors is an integer number (2702679630).

Almost surely, 2^21311421203 is an apocalyptic number.

21311421203 is a deficient number, since it is larger than the sum of its proper divisors (310015837).

21311421203 is a wasteful number, since it uses less digits than its factorization.

21311421203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119397.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21311421203 its reverse (30212411312), we get a palindrome (51523832515).

The spelling of 21311421203 in words is "twenty-one billion, three hundred eleven million, four hundred twenty-one thousand, two hundred three".