1221412441 has 2 divisors, whose sum is σ = 1221412442. Its totient is φ = 1221412440.

The previous prime is 1221412433. The next prime is 1221412483. The reversal of 1221412441 is 1442141221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1209578841 + 11833600 = 34779^2 + 3440^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221412441 - 2³ = 1221412433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221412541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610706220 + 610706221.

It is an arithmetic number, because the mean of its divisors is an integer number (610706221).

Almost surely, 2^1221412441 is an apocalyptic number.

It is an amenable number.

1221412441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221412441 is an equidigital number, since it uses as much as digits as its factorization.

1221412441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 22.

The square root of 1221412441 is about 34948.7115785403. The cubic root of 1221412441 is about 1068.9419304608.

Adding to 1221412441 its reverse (1442141221), we get a palindrome (2663553662).

The spelling of 1221412441 in words is "one billion, two hundred twenty-one million, four hundred twelve thousand, four hundred forty-one".