20112221003 has 4 divisors (see below), whose sum is σ = 22985395440. Its totient is φ = 17239046568.

The previous prime is 20112220939. The next prime is 20112221011. The reversal of 20112221003 is 30012221102.

It is a happy number.

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 20112221003 - 2⁶ = 20112220939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20112211003) 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, 1436587208 + ... + 1436587221.

It is an arithmetic number, because the mean of its divisors is an integer number (5746348860).

Almost surely, 2^20112221003 is an apocalyptic number.

20112221003 is a deficient number, since it is larger than the sum of its proper divisors (2873174437).

20112221003 is an equidigital number, since it uses as much as digits as its factorization.

20112221003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2873174436.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20112221003 its reverse (30012221102), we get a palindrome (50124442105).

Subtracting 20112221003 from its reverse (30012221102), we obtain a palindrome (9900000099).

The spelling of 20112221003 in words is "twenty billion, one hundred twelve million, two hundred twenty-one thousand, three".