1213220563 has 2 divisors, whose sum is σ = 1213220564. Its totient is φ = 1213220562.

The previous prime is 1213220549. The next prime is 1213220579. The reversal of 1213220563 is 3650223121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213220563 - 2²⁹ = 676349651 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213220513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606610281 + 606610282.

It is an arithmetic number, because the mean of its divisors is an integer number (606610282).

Almost surely, 2^1213220563 is an apocalyptic number.

1213220563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213220563 is an equidigital number, since it uses as much as digits as its factorization.

1213220563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1213220563 is about 34831.3158379066. The cubic root of 1213220563 is about 1066.5468094601.

Adding to 1213220563 its reverse (3650223121), we get a palindrome (4863443684).

The spelling of 1213220563 in words is "one billion, two hundred thirteen million, two hundred twenty thousand, five hundred sixty-three".