109204634521 has 4 divisors (see below), whose sum is σ = 109373421312. Its totient is φ = 109035847732.

The previous prime is 109204634491. The next prime is 109204634543. The reversal of 109204634521 is 125436402901.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-109204634521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109204634551) 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, 84392425 + ... + 84393718.

It is an arithmetic number, because the mean of its divisors is an integer number (27343355328).

Almost surely, 2^109204634521 is an apocalyptic number.

It is an amenable number.

109204634521 is a deficient number, since it is larger than the sum of its proper divisors (168786791).

109204634521 is an equidigital number, since it uses as much as digits as its factorization.

109204634521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168786790.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 109204634521 in words is "one hundred nine billion, two hundred four million, six hundred thirty-four thousand, five hundred twenty-one".