20003123201 has 12 divisors (see below), whose sum is σ = 20833367100. Its totient is φ = 19183123008.

The previous prime is 20003123197. The next prime is 20003123213. The reversal of 20003123201 is 10232130002.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2899714801 + 17103408400 = 53849^2 + 130780^2 .

It is not a de Polignac number, because 20003123201 - 2² = 20003123197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20003123281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 628295 + ... + 659363.

It is an arithmetic number, because the mean of its divisors is an integer number (1736113925).

Almost surely, 2^20003123201 is an apocalyptic number.

It is an amenable number.

20003123201 is a deficient number, since it is larger than the sum of its proper divisors (830243899).

20003123201 is an equidigital number, since it uses as much as digits as its factorization.

20003123201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31396 (or 31247 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20003123201 its reverse (10232130002), we get a palindrome (30235253203).

The spelling of 20003123201 in words is "twenty billion, three million, one hundred twenty-three thousand, two hundred one".