1224774221 has 16 divisors (see below), whose sum is σ = 1351318848. Its totient is φ = 1109995920.

The previous prime is 1224774193. The next prime is 1224774223.

1224774221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1224774221 - 2¹⁴ = 1224757837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224774223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 495230 + ... + 497696.

It is an arithmetic number, because the mean of its divisors is an integer number (84457428).

Almost surely, 2^1224774221 is an apocalyptic number.

1224774221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1224774221 is a deficient number, since it is larger than the sum of its proper divisors (126544627).

1224774221 is an equidigital number, since it uses as much as digits as its factorization.

1224774221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2873 (or 2851 counting only the distinct ones).

The product of its digits is 12544, while the sum is 32.

The square root of 1224774221 is about 34996.7744370821. The cubic root of 1224774221 is about 1069.9217402802.

It can be divided in two parts, 12247 and 74221, that added together give a palindrome (86468).

The spelling of 1224774221 in words is "one billion, two hundred twenty-four million, seven hundred seventy-four thousand, two hundred twenty-one".