1121013563 has 2 divisors, whose sum is σ = 1121013564. Its totient is φ = 1121013562.

The previous prime is 1121013529. The next prime is 1121013613. The reversal of 1121013563 is 3653101211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121013563 - 2¹⁶ = 1120948027 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1121013503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560506781 + 560506782.

It is an arithmetic number, because the mean of its divisors is an integer number (560506782).

Almost surely, 2^1121013563 is an apocalyptic number.

1121013563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121013563 is an equidigital number, since it uses as much as digits as its factorization.

1121013563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1121013563 is about 33481.5406306221. The cubic root of 1121013563 is about 1038.8119949600.

Adding to 1121013563 its reverse (3653101211), we get a palindrome (4774114774).

The spelling of 1121013563 in words is "one billion, one hundred twenty-one million, thirteen thousand, five hundred sixty-three".