11121231125 has 8 divisors (see below), whose sum is σ = 13879296600. Its totient is φ = 8896984800.

The previous prime is 11121231103. The next prime is 11121231151. The reversal of 11121231125 is 52113212111.

It can be written as a sum of positive squares in 4 ways, for example, as 321449041 + 10799782084 = 17929^2 + 103922^2 .

It is not a de Polignac number, because 11121231125 - 2⁶ = 11121231061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11121231097 and 11121231106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44484800 + ... + 44485049.

It is an arithmetic number, because the mean of its divisors is an integer number (1734912075).

Almost surely, 2^11121231125 is an apocalyptic number.

It is an amenable number.

11121231125 is a deficient number, since it is larger than the sum of its proper divisors (2758065475).

11121231125 is an frugal number, since it uses more digits than its factorization.

11121231125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88969864 (or 88969854 counting only the distinct ones).

The product of its digits is 120, while the sum is 20.

Adding to 11121231125 its reverse (52113212111), we get a palindrome (63234443236).

The spelling of 11121231125 in words is "eleven billion, one hundred twenty-one million, two hundred thirty-one thousand, one hundred twenty-five".