20121134203 has 2 divisors, whose sum is σ = 20121134204. Its totient is φ = 20121134202.

The previous prime is 20121134171. The next prime is 20121134221. The reversal of 20121134203 is 30243112102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20121134203 - 2⁵ = 20121134171 is a prime.

It is not a weakly prime, because it can be changed into another prime (20121134303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060567101 + 10060567102.

It is an arithmetic number, because the mean of its divisors is an integer number (10060567102).

Almost surely, 2^20121134203 is an apocalyptic number.

20121134203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121134203 is an equidigital number, since it uses as much as digits as its factorization.

20121134203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20121134203 its reverse (30243112102), we get a palindrome (50364246305).

The spelling of 20121134203 in words is "twenty billion, one hundred twenty-one million, one hundred thirty-four thousand, two hundred three".