1113212125 has 16 divisors (see below), whose sum is σ = 1437199920. Its totient is φ = 859857600.

The previous prime is 1113212117. The next prime is 1113212137. The reversal of 1113212125 is 5212123111.

It can be written as a sum of positive squares in 8 ways, for example, as 686335204 + 426876921 = 26198^2 + 20661^2 .

It is not a de Polignac number, because 1113212125 - 2³ = 1113212117 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, 149922 + ... + 157171.

It is an arithmetic number, because the mean of its divisors is an integer number (89824995).

Almost surely, 2^1113212125 is an apocalyptic number.

It is an amenable number.

1113212125 is a deficient number, since it is larger than the sum of its proper divisors (323987795).

1113212125 is an equidigital number, since it uses as much as digits as its factorization.

1113212125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307137 (or 307127 counting only the distinct ones).

The product of its digits is 120, while the sum is 19.

The square root of 1113212125 is about 33364.8336576102. The cubic root of 1113212125 is about 1036.3965914642.

Adding to 1113212125 its reverse (5212123111), we get a palindrome (6325335236).

The spelling of 1113212125 in words is "one billion, one hundred thirteen million, two hundred twelve thousand, one hundred twenty-five".