1123203121203 has 16 divisors (see below), whose sum is σ = 1535153886720. Its totient is φ = 730145672736.

The previous prime is 1123203121141. The next prime is 1123203121211. The reversal of 1123203121203 is 3021213023211.

It is not a de Polignac number, because 1123203121203 - 2¹² = 1123203117107 is a prime.

It is a super-2 number, since 2×1123203121203² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1123203121203.

It is not an unprimeable number, because it can be changed into a prime (1123203121223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14768725 + ... + 14844582.

It is an arithmetic number, because the mean of its divisors is an integer number (95947117920).

Almost surely, 2^{1123203121203} is an apocalyptic number.

1123203121203 is a deficient number, since it is larger than the sum of its proper divisors (411950765517).

1123203121203 is a wasteful number, since it uses less digits than its factorization.

1123203121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29613626.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1123203121203 its reverse (3021213023211), we get a palindrome (4144416144414).

The spelling of 1123203121203 in words is "one trillion, one hundred twenty-three billion, two hundred three million, one hundred twenty-one thousand, two hundred three".