1220221141 has 2 divisors, whose sum is σ = 1220221142. Its totient is φ = 1220221140.

The previous prime is 1220221129. The next prime is 1220221147. The reversal of 1220221141 is 1411220221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1204784100 + 15437041 = 34710^2 + 3929^2 .

It is an emirp because it is prime and its reverse (1411220221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220221141 - 2¹¹ = 1220219093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220221147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610110570 + 610110571.

It is an arithmetic number, because the mean of its divisors is an integer number (610110571).

Almost surely, 2^1220221141 is an apocalyptic number.

It is an amenable number.

1220221141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220221141 is an equidigital number, since it uses as much as digits as its factorization.

1220221141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1220221141 is about 34931.6638739124. The cubic root of 1220221141 is about 1068.5942879241.

Adding to 1220221141 its reverse (1411220221), we get a palindrome (2631441362).

The spelling of 1220221141 in words is "one billion, two hundred twenty million, two hundred twenty-one thousand, one hundred forty-one".