1105220521 has 2 divisors, whose sum is σ = 1105220522. Its totient is φ = 1105220520.

The previous prime is 1105220513. The next prime is 1105220527. The reversal of 1105220521 is 1250225011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1102970521 + 2250000 = 33211^2 + 1500^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105220521 - 2³ = 1105220513 is a prime.

It is a super-2 number, since 2×1105220521² = 2443024800079022882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1105220527) 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, 552610260 + 552610261.

It is an arithmetic number, because the mean of its divisors is an integer number (552610261).

Almost surely, 2^1105220521 is an apocalyptic number.

It is an amenable number.

1105220521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105220521 is an equidigital number, since it uses as much as digits as its factorization.

1105220521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1105220521 is about 33244.8570609049. The cubic root of 1105220521 is about 1033.9105812429.

Adding to 1105220521 its reverse (1250225011), we get a palindrome (2355445532).

The spelling of 1105220521 in words is "one billion, one hundred five million, two hundred twenty thousand, five hundred twenty-one".