1121511541 has 2 divisors, whose sum is σ = 1121511542. Its totient is φ = 1121511540.

The previous prime is 1121511529. The next prime is 1121511617. The reversal of 1121511541 is 1451151211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1110289041 + 11222500 = 33321^2 + 3350^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121511541 - 2²¹ = 1119414389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121511341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560755770 + 560755771.

It is an arithmetic number, because the mean of its divisors is an integer number (560755771).

Almost surely, 2^1121511541 is an apocalyptic number.

It is an amenable number.

1121511541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121511541 is an equidigital number, since it uses as much as digits as its factorization.

1121511541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 200, while the sum is 22.

The square root of 1121511541 is about 33488.9764101562. The cubic root of 1121511541 is about 1038.9657929621.

Adding to 1121511541 its reverse (1451151211), we get a palindrome (2572662752).

The spelling of 1121511541 in words is "one billion, one hundred twenty-one million, five hundred eleven thousand, five hundred forty-one".