20121200103 has 16 divisors (see below), whose sum is σ = 27826176096. Its totient is φ = 12922358400.

The previous prime is 20121200087. The next prime is 20121200107. The reversal of 20121200103 is 30100212102.

It is not a de Polignac number, because 20121200103 - 2⁴ = 20121200087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121200107) 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 15 ways as a sum of consecutive naturals, for example, 886176 + ... + 908597.

It is an arithmetic number, because the mean of its divisors is an integer number (1739136006).

Almost surely, 2^20121200103 is an apocalyptic number.

20121200103 is a deficient number, since it is larger than the sum of its proper divisors (7704975993).

20121200103 is a wasteful number, since it uses less digits than its factorization.

20121200103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794914.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20121200103 its reverse (30100212102), we get a palindrome (50221412205).

The spelling of 20121200103 in words is "twenty billion, one hundred twenty-one million, two hundred thousand, one hundred three".