5561101121 has 2 divisors, whose sum is σ = 5561101122. Its totient is φ = 5561101120.

The previous prime is 5561101099. The next prime is 5561101141. The reversal of 5561101121 is 1211011655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5559790096 + 1311025 = 74564^2 + 1145^2 .

It is a cyclic number.

It is not a de Polignac number, because 5561101121 - 2¹⁸ = 5560838977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (5561101141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780550560 + 2780550561.

It is an arithmetic number, because the mean of its divisors is an integer number (2780550561).

Almost surely, 2^5561101121 is an apocalyptic number.

It is an amenable number.

5561101121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561101121 is an equidigital number, since it uses as much as digits as its factorization.

5561101121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 23.

The square root of 5561101121 is about 74572.7907550737. The cubic root of 5561101121 is about 1771.6867235955.

Adding to 5561101121 its reverse (1211011655), we get a palindrome (6772112776).

The spelling of 5561101121 in words is "five billion, five hundred sixty-one million, one hundred one thousand, one hundred twenty-one".