1100721107 has 2 divisors, whose sum is σ = 1100721108. Its totient is φ = 1100721106.

The previous prime is 1100721101. The next prime is 1100721109. The reversal of 1100721107 is 7011270011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1100721107 - 2²⁰ = 1099672531 is a prime.

Together with 1100721109, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1100721101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550360553 + 550360554.

It is an arithmetic number, because the mean of its divisors is an integer number (550360554).

Almost surely, 2^1100721107 is an apocalyptic number.

1100721107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100721107 is an equidigital number, since it uses as much as digits as its factorization.

1100721107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98, while the sum is 20.

The square root of 1100721107 is about 33177.1172195536. The cubic root of 1100721107 is about 1032.5056372187.

Adding to 1100721107 its reverse (7011270011), we get a palindrome (8111991118).

The spelling of 1100721107 in words is "one billion, one hundred million, seven hundred twenty-one thousand, one hundred seven".