121111123203 has 24 divisors (see below), whose sum is σ = 200021452800. Its totient is φ = 69174517104.

The previous prime is 121111123181. The next prime is 121111123219. The reversal of 121111123203 is 302321111121.

It is not a de Polignac number, because 121111123203 - 2¹³ = 121111115011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121111123303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 303843 + ... + 578396.

It is an arithmetic number, because the mean of its divisors is an integer number (8334227200).

Almost surely, 2^121111123203 is an apocalyptic number.

121111123203 is a deficient number, since it is larger than the sum of its proper divisors (78910329597).

121111123203 is a wasteful number, since it uses less digits than its factorization.

121111123203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884431 (or 884428 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121111123203 its reverse (302321111121), we get a palindrome (423432234324).

The spelling of 121111123203 in words is "one hundred twenty-one billion, one hundred eleven million, one hundred twenty-three thousand, two hundred three".