1221074417 has 2 divisors, whose sum is σ = 1221074418. Its totient is φ = 1221074416.

The previous prime is 1221074411. The next prime is 1221074489. The reversal of 1221074417 is 7144701221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 755205361 + 465869056 = 27481^2 + 21584^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221074417 - 2¹⁰ = 1221073393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1221074417.

It is not a weakly prime, because it can be changed into another prime (1221074411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610537208 + 610537209.

It is an arithmetic number, because the mean of its divisors is an integer number (610537209).

Almost surely, 2^1221074417 is an apocalyptic number.

It is an amenable number.

1221074417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221074417 is an equidigital number, since it uses as much as digits as its factorization.

1221074417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 1221074417 is about 34943.8752430236. The cubic root of 1221074417 is about 1068.8433120219.

Adding to 1221074417 its reverse (7144701221), we get a palindrome (8365775638).

The spelling of 1221074417 in words is "one billion, two hundred twenty-one million, seventy-four thousand, four hundred seventeen".