21113221303 has 4 divisors (see below), whose sum is σ = 21231172440. Its totient is φ = 20995270168.

The previous prime is 21113221271. The next prime is 21113221307. The reversal of 21113221303 is 30312231112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21113221303 - 2⁵ = 21113221271 is a prime.

It is a super-2 number, since 2×21113221303² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113221307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58975300 + ... + 58975657.

It is an arithmetic number, because the mean of its divisors is an integer number (5307793110).

Almost surely, 2^21113221303 is an apocalyptic number.

21113221303 is a deficient number, since it is larger than the sum of its proper divisors (117951137).

21113221303 is a wasteful number, since it uses less digits than its factorization.

21113221303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117951136.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21113221303 its reverse (30312231112), we get a palindrome (51425452415).

The spelling of 21113221303 in words is "twenty-one billion, one hundred thirteen million, two hundred twenty-one thousand, three hundred three".