20123221203 has 32 divisors (see below), whose sum is σ = 31130004480. Its totient is φ = 12823272000.

The previous prime is 20123221123. The next prime is 20123221211. The reversal of 20123221203 is 30212232102.

It is not a de Polignac number, because 20123221203 - 2¹⁷ = 20123090131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20123221213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 947703 + ... + 968703.

It is an arithmetic number, because the mean of its divisors is an integer number (972812640).

Almost surely, 2^20123221203 is an apocalyptic number.

20123221203 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20123221203 is a deficient number, since it is larger than the sum of its proper divisors (11006783277).

20123221203 is a wasteful number, since it uses less digits than its factorization.

20123221203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22576 (or 22570 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20123221203 its reverse (30212232102), we get a palindrome (50335453305).

The spelling of 20123221203 in words is "twenty billion, one hundred twenty-three million, two hundred twenty-one thousand, two hundred three".