1221710241 has 32 divisors (see below), whose sum is σ = 1745424000. Its totient is φ = 757900800.

The previous prime is 1221710201. The next prime is 1221710291. The reversal of 1221710241 is 1420171221.

It is not a de Polignac number, because 1221710241 - 2⁶ = 1221710177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221710201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 787935 + ... + 789483.

It is an arithmetic number, because the mean of its divisors is an integer number (54544500).

Almost surely, 2^1221710241 is an apocalyptic number.

It is an amenable number.

1221710241 is a deficient number, since it is larger than the sum of its proper divisors (523713759).

1221710241 is a wasteful number, since it uses less digits than its factorization.

1221710241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1221710241 is about 34952.9718478987. The cubic root of 1221710241 is about 1069.0287984802.

Adding to 1221710241 its reverse (1420171221), we get a palindrome (2641881462).

The spelling of 1221710241 in words is "one billion, two hundred twenty-one million, seven hundred ten thousand, two hundred forty-one".