21113323303 has 4 divisors (see below), whose sum is σ = 21380580640. Its totient is φ = 20846065968.

The previous prime is 21113323243. The next prime is 21113323339. The reversal of 21113323303 is 30332331112.

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 21113323303 - 2²¹ = 21111226151 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 (21113323003) 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, 133628550 + ... + 133628707.

It is an arithmetic number, because the mean of its divisors is an integer number (5345145160).

Almost surely, 2^21113323303 is an apocalyptic number.

21113323303 is a deficient number, since it is larger than the sum of its proper divisors (267257337).

21113323303 is an equidigital number, since it uses as much as digits as its factorization.

21113323303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267257336.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21113323303 its reverse (30332331112), we get a palindrome (51445654415).

The spelling of 21113323303 in words is "twenty-one billion, one hundred thirteen million, three hundred twenty-three thousand, three hundred three".