1224191665272 has 64 divisors (see below), whose sum is σ = 3125916518400. Its totient is φ = 399340690560.

The previous prime is 1224191665267. The next prime is 1224191665309. The reversal of 1224191665272 is 2725661914221.

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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12119697 + ... + 12220287.

It is an arithmetic number, because the mean of its divisors is an integer number (48842445600).

Almost surely, 2^{1224191665272} is an apocalyptic number.

1224191665272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1224191665272 is an abundant number, since it is smaller than the sum of its proper divisors (1901724853128).

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

1224191665272 is a wasteful number, since it uses less digits than its factorization.

1224191665272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111436 (or 111432 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The spelling of 1224191665272 in words is "one trillion, two hundred twenty-four billion, one hundred ninety-one million, six hundred sixty-five thousand, two hundred seventy-two".