1224240866921 has 8 divisors (see below), whose sum is σ = 1227980479488. Its totient is φ = 1220501502000.

The previous prime is 1224240866879. The next prime is 1224240866993. The reversal of 1224240866921 is 1296680424221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1224240866921 - 2³⁰ = 1223167125097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224240866521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16868291 + ... + 16940711.

It is an arithmetic number, because the mean of its divisors is an integer number (153497559936).

Almost surely, 2^{1224240866921} is an apocalyptic number.

It is an amenable number.

1224240866921 is a deficient number, since it is larger than the sum of its proper divisors (3739612567).

1224240866921 is an equidigital number, since it uses as much as digits as its factorization.

1224240866921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123823.

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 1224240866921 in words is "one trillion, two hundred twenty-four billion, two hundred forty million, eight hundred sixty-six thousand, nine hundred twenty-one".