1111212125 has 16 divisors (see below), whose sum is σ = 1406336256. Its totient is φ = 876442000.

The previous prime is 1111212121. The next prime is 1111212203. The reversal of 1111212125 is 5212121111.

It is not a de Polignac number, because 1111212125 - 2² = 1111212121 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111212121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53729 + ... + 71478.

It is an arithmetic number, because the mean of its divisors is an integer number (87896016).

Almost surely, 2^1111212125 is an apocalyptic number.

It is an amenable number.

1111212125 is a deficient number, since it is larger than the sum of its proper divisors (295124131).

1111212125 is an equidigital number, since it uses as much as digits as its factorization.

1111212125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125293 (or 125283 counting only the distinct ones).

The product of its digits is 40, while the sum is 17.

The square root of 1111212125 is about 33334.8485072304. The cubic root of 1111212125 is about 1035.7755550641.

Adding to 1111212125 its reverse (5212121111), we get a palindrome (6323333236).

The spelling of 1111212125 in words is "one billion, one hundred eleven million, two hundred twelve thousand, one hundred twenty-five".