11203113121 has 8 divisors (see below), whose sum is σ = 11242845504. Its totient is φ = 11163450480.

The previous prime is 11203113109. The next prime is 11203113137. The reversal of 11203113121 is 12131130211.

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 11203113121 - 2⁷ = 11203112993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11203113095 and 11203113104.

It is not an unprimeable number, because it can be changed into a prime (11203113721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315556 + ... + 349258.

It is an arithmetic number, because the mean of its divisors is an integer number (1405355688).

Almost surely, 2^11203113121 is an apocalyptic number.

It is an amenable number.

11203113121 is a deficient number, since it is larger than the sum of its proper divisors (39732383).

11203113121 is an equidigital number, since it uses as much as digits as its factorization.

11203113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34871.

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

Adding to 11203113121 its reverse (12131130211), we get a palindrome (23334243332).

The spelling of 11203113121 in words is "eleven billion, two hundred three million, one hundred thirteen thousand, one hundred twenty-one".