11013123121 has 48 divisors (see below), whose sum is σ = 15650979840. Its totient is φ = 7504436160.

The previous prime is 11013123103. The next prime is 11013123133. The reversal of 11013123121 is 12132131011.

It is a happy number.

It is not a de Polignac number, because 11013123121 - 2⁷ = 11013122993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11013123095 and 11013123104.

It is not an unprimeable number, because it can be changed into a prime (11013123421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 224976 + ... + 269518.

It is an arithmetic number, because the mean of its divisors is an integer number (326062080).

Almost surely, 2^11013123121 is an apocalyptic number.

11013123121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11013123121 is a deficient number, since it is larger than the sum of its proper divisors (4637856719).

11013123121 is a wasteful number, since it uses less digits than its factorization.

11013123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44606 (or 44593 counting only the distinct ones).

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

Adding to 11013123121 its reverse (12132131011), we get a palindrome (23145254132).

The spelling of 11013123121 in words is "eleven billion, thirteen million, one hundred twenty-three thousand, one hundred twenty-one".