109421557799 has 4 divisors (see below), whose sum is σ = 109463308440. Its totient is φ = 109379807160.

The previous prime is 109421557789. The next prime is 109421557807. The reversal of 109421557799 is 997755124901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 997755124901 = 9781 ⋅102009521.

It is a cyclic number.

It is not a de Polignac number, because 109421557799 - 2⁸ = 109421557543 is a prime.

It is a super-2 number, since 2×109421557799² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109421557709) 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, 20871389 + ... + 20876630.

It is an arithmetic number, because the mean of its divisors is an integer number (27365827110).

Almost surely, 2^109421557799 is an apocalyptic number.

109421557799 is a deficient number, since it is larger than the sum of its proper divisors (41750641).

109421557799 is an equidigital number, since it uses as much as digits as its factorization.

109421557799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41750640.

The product of its (nonzero) digits is 7144200, while the sum is 59.

The spelling of 109421557799 in words is "one hundred nine billion, four hundred twenty-one million, five hundred fifty-seven thousand, seven hundred ninety-nine".