1099219121 has 16 divisors (see below), whose sum is σ = 1475875968. Its totient is φ = 790646400.

The previous prime is 1099219117. The next prime is 1099219157. The reversal of 1099219121 is 1219129901.

It is a cyclic number.

It is not a de Polignac number, because 1099219121 - 2² = 1099219117 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1099219171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 548060 + ... + 550061.

It is an arithmetic number, because the mean of its divisors is an integer number (92242248).

Almost surely, 2^1099219121 is an apocalyptic number.

1099219121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1099219121 is a deficient number, since it is larger than the sum of its proper divisors (376656847).

1099219121 is a wasteful number, since it uses less digits than its factorization.

1099219121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098152.

The product of its (nonzero) digits is 2916, while the sum is 35.

The square root of 1099219121 is about 33154.4736197093. The cubic root of 1099219121 is about 1032.0357891886.

The spelling of 1099219121 in words is "one billion, ninety-nine million, two hundred nineteen thousand, one hundred twenty-one".