11111234121 has 12 divisors (see below), whose sum is σ = 17284142148. Its totient is φ = 6837682464.

The previous prime is 11111234093. The next prime is 11111234137. The reversal of 11111234121 is 12143211111.

It can be written as a sum of positive squares in 2 ways, for example, as 897302025 + 10213932096 = 29955^2 + 101064^2 .

It is not a de Polignac number, because 11111234121 - 2⁵ = 11111234089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111234094 and 11111234103.

It is not an unprimeable number, because it can be changed into a prime (11111234171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47483790 + ... + 47484023.

It is an arithmetic number, because the mean of its divisors is an integer number (1440345179).

Almost surely, 2^11111234121 is an apocalyptic number.

It is an amenable number.

11111234121 is a deficient number, since it is larger than the sum of its proper divisors (6172908027).

11111234121 is a wasteful number, since it uses less digits than its factorization.

11111234121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94967832 (or 94967829 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 11111234121 its reverse (12143211111), we get a palindrome (23254445232).

The spelling of 11111234121 in words is "eleven billion, one hundred eleven million, two hundred thirty-four thousand, one hundred twenty-one".