1213225116 has 24 divisors (see below), whose sum is σ = 2907369360. Its totient is φ = 393478272.

The previous prime is 1213225093. The next prime is 1213225151. The reversal of 1213225116 is 6115223121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1365801 + ... + 1366688.

It is an arithmetic number, because the mean of its divisors is an integer number (121140390).

Almost surely, 2^1213225116 is an apocalyptic number.

It is an amenable number.

1213225116 is an abundant number, since it is smaller than the sum of its proper divisors (1694144244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213225116 is a wasteful number, since it uses less digits than its factorization.

1213225116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732533 (or 2732531 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 1213225116 is about 34831.3811956977. The cubic root of 1213225116 is about 1066.5481436450.

Adding to 1213225116 its reverse (6115223121), we get a palindrome (7328448237).

The spelling of 1213225116 in words is "one billion, two hundred thirteen million, two hundred twenty-five thousand, one hundred sixteen".