21113442203 has 8 divisors (see below), whose sum is σ = 24198007008. Its totient is φ = 18045967104.

The previous prime is 21113442197. The next prime is 21113442239. The reversal of 21113442203 is 30224431112.

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 21113442203 - 2¹⁰ = 21113441179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21113441203) 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, 4269776 + ... + 4274717.

It is an arithmetic number, because the mean of its divisors is an integer number (3024750876).

Almost surely, 2^21113442203 is an apocalyptic number.

21113442203 is a deficient number, since it is larger than the sum of its proper divisors (3084564805).

21113442203 is an equidigital number, since it uses as much as digits as its factorization.

21113442203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8544853.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21113442203 its reverse (30224431112), we get a palindrome (51337873315).

The spelling of 21113442203 in words is "twenty-one billion, one hundred thirteen million, four hundred forty-two thousand, two hundred three".