1100203111123 has 8 divisors (see below), whose sum is σ = 1104106272192. Its totient is φ = 1096302024936.

The previous prime is 1100203111013. The next prime is 1100203111141. The reversal of 1100203111123 is 3211113020011.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1100203111123 - 2¹³ = 1100203102931 is a prime.

It is a super-2 number, since 2×1100203111123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1100203111097 and 1100203111106.

It is not an unprimeable number, because it can be changed into a prime (1100203111153) 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 in 7 ways as a sum of consecutive naturals, for example, 547536 + ... + 1581202.

It is an arithmetic number, because the mean of its divisors is an integer number (138013284024).

Almost surely, 2^{1100203111123} is an apocalyptic number.

1100203111123 is a deficient number, since it is larger than the sum of its proper divisors (3903161069).

1100203111123 is a wasteful number, since it uses less digits than its factorization.

1100203111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037441.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1100203111123 its reverse (3211113020011), we get a palindrome (4311316131134).

The spelling of 1100203111123 in words is "one trillion, one hundred billion, two hundred three million, one hundred eleven thousand, one hundred twenty-three".