1099352921 has 4 divisors (see below), whose sum is σ = 1124919312. Its totient is φ = 1073786532.

The previous prime is 1099352911. The next prime is 1099352927. The reversal of 1099352921 is 1292539901.

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 1099352921 - 2⁶ = 1099352857 is a prime.

It is a super-2 number, since 2×1099352921² = 2417153689822464482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1099352927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12783131 + ... + 12783216.

It is an arithmetic number, because the mean of its divisors is an integer number (281229828).

Almost surely, 2^1099352921 is an apocalyptic number.

It is an amenable number.

1099352921 is a deficient number, since it is larger than the sum of its proper divisors (25566391).

1099352921 is an equidigital number, since it uses as much as digits as its factorization.

1099352921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25566390.

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 1099352921 is about 33156.4913855492. The cubic root of 1099352921 is about 1032.0776615759.

The spelling of 1099352921 in words is "one billion, ninety-nine million, three hundred fifty-two thousand, nine hundred twenty-one".