109155301921 has 4 divisors (see below), whose sum is σ = 115576202052. Its totient is φ = 102734401792.

The previous prime is 109155301909. The next prime is 109155301933. The reversal of 109155301921 is 129103551901.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (109155301909) and next prime (109155301933).

It can be written as a sum of positive squares in 2 ways, for example, as 79785911296 + 29369390625 = 282464^2 + 171375^2 .

It is a cyclic number.

It is not a de Polignac number, because 109155301921 - 2⁵ = 109155301889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109155301961) 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 in 3 ways as a sum of consecutive naturals, for example, 3210450040 + ... + 3210450073.

It is an arithmetic number, because the mean of its divisors is an integer number (28894050513).

Almost surely, 2^109155301921 is an apocalyptic number.

It is an amenable number.

109155301921 is a deficient number, since it is larger than the sum of its proper divisors (6420900131).

109155301921 is an equidigital number, since it uses as much as digits as its factorization.

109155301921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6420900130.

The product of its (nonzero) digits is 12150, while the sum is 37.

The spelling of 109155301921 in words is "one hundred nine billion, one hundred fifty-five million, three hundred one thousand, nine hundred twenty-one".