1099373121 has 32 divisors (see below), whose sum is σ = 2030592000. Its totient is φ = 571101840.

The previous prime is 1099373083. The next prime is 1099373201. The reversal of 1099373121 is 1213739901.

It is a happy number.

It is not a de Polignac number, because 1099373121 - 2¹⁹ = 1098848833 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1099372121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262321 + ... + 266478.

It is an arithmetic number, because the mean of its divisors is an integer number (63456000).

Almost surely, 2^1099373121 is an apocalyptic number.

1099373121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1099373121 is a deficient number, since it is larger than the sum of its proper divisors (931218879).

1099373121 is a wasteful number, since it uses less digits than its factorization.

1099373121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528826 (or 528820 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 1099373121 is about 33156.7960002169. The cubic root of 1099373121 is about 1032.0839828220.

The spelling of 1099373121 in words is "one billion, ninety-nine million, three hundred seventy-three thousand, one hundred twenty-one".