21231230109 has 8 divisors (see below), whose sum is σ = 28309257600. Its totient is φ = 14153678016.

The previous prime is 21231230101. The next prime is 21231230213. The reversal of 21231230109 is 90103213212.

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

It is not a de Polignac number, because 21231230109 - 2³ = 21231230101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231230101) 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, 3292 + ... + 206090.

It is an arithmetic number, because the mean of its divisors is an integer number (3538657200).

Almost surely, 2^21231230109 is an apocalyptic number.

It is an amenable number.

21231230109 is a deficient number, since it is larger than the sum of its proper divisors (7078027491).

21231230109 is a wasteful number, since it uses less digits than its factorization.

21231230109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237699.

The product of its (nonzero) digits is 648, while the sum is 24.

The spelling of 21231230109 in words is "twenty-one billion, two hundred thirty-one million, two hundred thirty thousand, one hundred nine".