1099110021 has 4 divisors (see below), whose sum is σ = 1465480032. Its totient is φ = 732740012.

The previous prime is 1099109969. The next prime is 1099110029. The reversal of 1099110021 is 1200119901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1099110021 - 2¹¹ = 1099107973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1099109973 and 1099110000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099110029) 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 3 ways as a sum of consecutive naturals, for example, 183185001 + ... + 183185006.

It is an arithmetic number, because the mean of its divisors is an integer number (366370008).

Almost surely, 2^1099110021 is an apocalyptic number.

It is an amenable number.

1099110021 is a deficient number, since it is larger than the sum of its proper divisors (366370011).

1099110021 is an equidigital number, since it uses as much as digits as its factorization.

1099110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366370010.

The product of its (nonzero) digits is 162, while the sum is 24.

The square root of 1099110021 is about 33152.8282503922. The cubic root of 1099110021 is about 1032.0016440918.

Adding to 1099110021 its reverse (1200119901), we get a palindrome (2299229922).

It can be divided in two parts, 10991 and 10021, that added together give a palindrome (21012).

The spelling of 1099110021 in words is "one billion, ninety-nine million, one hundred ten thousand, twenty-one".