203112122131211 has 4 divisors (see below), whose sum is σ = 203581203245112. Its totient is φ = 202643041017312.

The previous prime is 203112122131063. The next prime is 203112122131229. The reversal of 203112122131211 is 112131221211302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203112122131211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203112122131291) 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, 234540556301 + ... + 234540557166.

It is an arithmetic number, because the mean of its divisors is an integer number (50895300811278).

Almost surely, 2^{203112122131211} is an apocalyptic number.

203112122131211 is a deficient number, since it is larger than the sum of its proper divisors (469081113901).

203112122131211 is an equidigital number, since it uses as much as digits as its factorization.

203112122131211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469081113900.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 203112122131211 its reverse (112131221211302), we get a palindrome (315243343342513).

The spelling of 203112122131211 in words is "two hundred three trillion, one hundred twelve billion, one hundred twenty-two million, one hundred thirty-one thousand, two hundred eleven".