21112221003 has 8 divisors (see below), whose sum is σ = 28180262400. Its totient is φ = 14059496808.

The previous prime is 21112220993. The next prime is 21112221023. The reversal of 21112221003 is 30012221112.

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

It is not a de Polignac number, because 21112221003 - 2⁵ = 21112220971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112221023) 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, 3826083 + ... + 3831596.

It is an arithmetic number, because the mean of its divisors is an integer number (3522532800).

Almost surely, 2^21112221003 is an apocalyptic number.

21112221003 is a deficient number, since it is larger than the sum of its proper divisors (7068041397).

21112221003 is an equidigital number, since it uses as much as digits as its factorization.

21112221003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7658601.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21112221003 its reverse (30012221112), we get a palindrome (51124442115).

The spelling of 21112221003 in words is "twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, three".