1105332721 has 2 divisors, whose sum is σ = 1105332722. Its totient is φ = 1105332720.

The previous prime is 1105332691. The next prime is 1105332769. The reversal of 1105332721 is 1272335011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 828576225 + 276756496 = 28785^2 + 16636^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105332721 - 2¹¹ = 1105330673 is a prime.

It is a super-2 number, since 2×1105332721² = 2443520848226527682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1105302721) 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, 552666360 + 552666361.

It is an arithmetic number, because the mean of its divisors is an integer number (552666361).

Almost surely, 2^1105332721 is an apocalyptic number.

It is an amenable number.

1105332721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105332721 is an equidigital number, since it uses as much as digits as its factorization.

1105332721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 1105332721 is about 33246.5444971353. The cubic root of 1105332721 is about 1033.9455669734.

Adding to 1105332721 its reverse (1272335011), we get a palindrome (2377667732).

The spelling of 1105332721 in words is "one billion, one hundred five million, three hundred thirty-two thousand, seven hundred twenty-one".