203123111222 has 4 divisors (see below), whose sum is σ = 304684666836. Its totient is φ = 101561555610.

The previous prime is 203123111171. The next prime is 203123111227. The reversal of 203123111222 is 222111321302.

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

It is a junction number, because it is equal to n+sod(n) for n = 203123111194 and 203123111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203123111227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50780777804 + ... + 50780777807.

It is an arithmetic number, because the mean of its divisors is an integer number (76171166709).

Almost surely, 2^203123111222 is an apocalyptic number.

203123111222 is a deficient number, since it is larger than the sum of its proper divisors (101561555614).

203123111222 is a wasteful number, since it uses less digits than its factorization.

203123111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101561555613.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 203123111222 its reverse (222111321302), we get a palindrome (425234432524).

The spelling of 203123111222 in words is "two hundred three billion, one hundred twenty-three million, one hundred eleven thousand, two hundred twenty-two".