1121161541 has 2 divisors, whose sum is σ = 1121161542. Its totient is φ = 1121161540.

The previous prime is 1121161513. The next prime is 1121161571. The reversal of 1121161541 is 1451611211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1088340100 + 32821441 = 32990^2 + 5729^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121161541 - 2¹⁸ = 1120899397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121161501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560580770 + 560580771.

It is an arithmetic number, because the mean of its divisors is an integer number (560580771).

Almost surely, 2^1121161541 is an apocalyptic number.

It is an amenable number.

1121161541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121161541 is an equidigital number, since it uses as much as digits as its factorization.

1121161541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 23.

The square root of 1121161541 is about 33483.7504022474. The cubic root of 1121161541 is about 1038.8577019770.

Adding to 1121161541 its reverse (1451611211), we get a palindrome (2572772752).

The spelling of 1121161541 in words is "one billion, one hundred twenty-one million, one hundred sixty-one thousand, five hundred forty-one".