1240224221 has 16 divisors (see below), whose sum is σ = 1332979200. Its totient is φ = 1150314048.

The previous prime is 1240224217. The next prime is 1240224277. The reversal of 1240224221 is 1224220421.

It is a cyclic number.

It is not a de Polignac number, because 1240224221 - 2² = 1240224217 is a prime.

It is a super-2 number, since 2×1240224221² = 3076312236710113682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1240224193 and 1240224202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240224281) by changing a digit.

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, 610235 + ... + 612263.

It is an arithmetic number, because the mean of its divisors is an integer number (83311200).

Almost surely, 2^1240224221 is an apocalyptic number.

It is an amenable number.

1240224221 is a deficient number, since it is larger than the sum of its proper divisors (92754979).

1240224221 is a wasteful number, since it uses less digits than its factorization.

1240224221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2708.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1240224221 is about 35216.8173036690. The cubic root of 1240224221 is about 1074.4018221756.

Adding to 1240224221 its reverse (1224220421), we get a palindrome (2464444642).

The spelling of 1240224221 in words is "one billion, two hundred forty million, two hundred twenty-four thousand, two hundred twenty-one".