1131111125 has 16 divisors (see below), whose sum is σ = 1435561920. Its totient is φ = 889546000.

The previous prime is 1131111101. The next prime is 1131111139. The reversal of 1131111125 is 5211111311.

It is not a de Polignac number, because 1131111125 - 2²² = 1126916821 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69311 + ... + 84060.

It is an arithmetic number, because the mean of its divisors is an integer number (89722620).

Almost surely, 2^1131111125 is an apocalyptic number.

It is an amenable number.

1131111125 is a deficient number, since it is larger than the sum of its proper divisors (304450795).

1131111125 is an equidigital number, since it uses as much as digits as its factorization.

1131111125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153445 (or 153435 counting only the distinct ones).

The product of its digits is 30, while the sum is 17.

The square root of 1131111125 is about 33631.9955548284. The cubic root of 1131111125 is about 1041.9217195894.

Adding to 1131111125 its reverse (5211111311), we get a palindrome (6342222436).

The spelling of 1131111125 in words is "one billion, one hundred thirty-one million, one hundred eleven thousand, one hundred twenty-five".