1221848224 has 24 divisors (see below), whose sum is σ = 2406348000. Its totient is φ = 610712256.

The previous prime is 1221848209. The next prime is 1221848227. The reversal of 1221848224 is 4228481221.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1221848224.

It is not an unprimeable number, because it can be changed into a prime (1221848227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131277 + ... + 140275.

It is an arithmetic number, because the mean of its divisors is an integer number (100264500).

Almost surely, 2^1221848224 is an apocalyptic number.

It is an amenable number.

1221848224 is a deficient number, since it is larger than the sum of its proper divisors (1184499776).

1221848224 is an equidigital number, since it uses as much as digits as its factorization.

1221848224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13252 (or 13244 counting only the distinct ones).

The product of its digits is 16384, while the sum is 34.

The square root of 1221848224 is about 34954.9456300536. The cubic root of 1221848224 is about 1069.0690432243.

The spelling of 1221848224 in words is "one billion, two hundred twenty-one million, eight hundred forty-eight thousand, two hundred twenty-four".