1220404441 has 2 divisors, whose sum is σ = 1220404442. Its totient is φ = 1220404440.

The previous prime is 1220404429. The next prime is 1220404459. The reversal of 1220404441 is 1444040221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 957283600 + 263120841 = 30940^2 + 16221^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220404441 is a prime.

It is a super-2 number, since 2×1220404441² = 2978773999225044962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1220404421) 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 as a sum of consecutive naturals, namely, 610202220 + 610202221.

It is an arithmetic number, because the mean of its divisors is an integer number (610202221).

Almost surely, 2^1220404441 is an apocalyptic number.

It is an amenable number.

1220404441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220404441 is an equidigital number, since it uses as much as digits as its factorization.

1220404441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 1220404441 is about 34934.2874694762. The cubic root of 1220404441 is about 1068.6477928502.

Adding to 1220404441 its reverse (1444040221), we get a palindrome (2664444662).

The spelling of 1220404441 in words is "one billion, two hundred twenty million, four hundred four thousand, four hundred forty-one".