109912621821 has 8 divisors (see below), whose sum is σ = 146551838400. Its totient is φ = 73274243232.

The previous prime is 109912621759. The next prime is 109912621873. The reversal of 109912621821 is 128126219901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 109912621821 - 2¹⁷ = 109912490749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109912620821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225705 + ... + 520353.

It is an arithmetic number, because the mean of its divisors is an integer number (18318979800).

Almost surely, 2^109912621821 is an apocalyptic number.

It is an amenable number.

109912621821 is a deficient number, since it is larger than the sum of its proper divisors (36639216579).

109912621821 is a wasteful number, since it uses less digits than its factorization.

109912621821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418995.

The product of its (nonzero) digits is 31104, while the sum is 42.

The spelling of 109912621821 in words is "one hundred nine billion, nine hundred twelve million, six hundred twenty-one thousand, eight hundred twenty-one".