1216251124 has 48 divisors (see below), whose sum is σ = 2413688256. Its totient is φ = 531360000.

The previous prime is 1216251119. The next prime is 1216251139. The reversal of 1216251124 is 4211526121.

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, 130624 + ... + 139624.

It is an arithmetic number, because the mean of its divisors is an integer number (50285172).

Almost surely, 2^1216251124 is an apocalyptic number.

It is an amenable number.

1216251124 is a deficient number, since it is larger than the sum of its proper divisors (1197437132).

1216251124 is a wasteful number, since it uses less digits than its factorization.

1216251124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9136 (or 9134 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 1216251124 is about 34874.7920997387. The cubic root of 1216251124 is about 1067.4341302752.

Adding to 1216251124 its reverse (4211526121), we get a palindrome (5427777245).

The spelling of 1216251124 in words is "one billion, two hundred sixteen million, two hundred fifty-one thousand, one hundred twenty-four".