20011223103 has 4 divisors (see below), whose sum is σ = 26681630808. Its totient is φ = 13340815400.

The previous prime is 20011223101. The next prime is 20011223131. The reversal of 20011223103 is 30132211002.

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 20011223103 - 2¹ = 20011223101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011223101) 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, 3335203848 + ... + 3335203853.

It is an arithmetic number, because the mean of its divisors is an integer number (6670407702).

Almost surely, 2^20011223103 is an apocalyptic number.

20011223103 is a deficient number, since it is larger than the sum of its proper divisors (6670407705).

20011223103 is an equidigital number, since it uses as much as digits as its factorization.

20011223103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6670407704.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20011223103 its reverse (30132211002), we get a palindrome (50143434105).

The spelling of 20011223103 in words is "twenty billion, eleven million, two hundred twenty-three thousand, one hundred three".