1222163641 has 2 divisors, whose sum is σ = 1222163642. Its totient is φ = 1222163640.

The previous prime is 1222163599. The next prime is 1222163647. The reversal of 1222163641 is 1463612221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 773952400 + 448211241 = 27820^2 + 21171^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222163641 - 2¹¹ = 1222161593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222163647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611081820 + 611081821.

It is an arithmetic number, because the mean of its divisors is an integer number (611081821).

Almost surely, 2^1222163641 is an apocalyptic number.

It is an amenable number.

1222163641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222163641 is an equidigital number, since it uses as much as digits as its factorization.

1222163641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 1222163641 is about 34959.4571039082. The cubic root of 1222163641 is about 1069.1610277910.

Adding to 1222163641 its reverse (1463612221), we get a palindrome (2685775862).

The spelling of 1222163641 in words is "one billion, two hundred twenty-two million, one hundred sixty-three thousand, six hundred forty-one".