1212512125 has 32 divisors (see below), whose sum is σ = 1667981952. Its totient is φ = 872640000.

The previous prime is 1212512117. The next prime is 1212512143. The reversal of 1212512125 is 5212152121.

It is a happy number.

It is not a de Polignac number, because 1212512125 - 2³ = 1212512117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212512096 and 1212512105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128830 + ... + 137920.

It is an arithmetic number, because the mean of its divisors is an integer number (52124436).

Almost surely, 2^1212512125 is an apocalyptic number.

It is an amenable number.

1212512125 is a deficient number, since it is larger than the sum of its proper divisors (455469827).

1212512125 is an equidigital number, since it uses as much as digits as its factorization.

1212512125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9214 (or 9204 counting only the distinct ones).

The product of its digits is 400, while the sum is 22.

The square root of 1212512125 is about 34821.1447973785. The cubic root of 1212512125 is about 1066.3391721932.

Adding to 1212512125 its reverse (5212152121), we get a palindrome (6424664246).

The spelling of 1212512125 in words is "one billion, two hundred twelve million, five hundred twelve thousand, one hundred twenty-five".