21232111985 has 8 divisors (see below), whose sum is σ = 29118325056. Its totient is φ = 14559162480.

The previous prime is 21232111871. The next prime is 21232111993. The reversal of 21232111985 is 58911123212.

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

It is not a de Polignac number, because 21232111985 - 2²⁰ = 21231063409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 606631771 = 21232111985 / (2 + 1 + 2 + 3 + 2 + 1 + 1 + 1 + 9 + 8 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303315851 + ... + 303315920.

It is an arithmetic number, because the mean of its divisors is an integer number (3639790632).

Almost surely, 2^21232111985 is an apocalyptic number.

It is an amenable number.

21232111985 is a deficient number, since it is larger than the sum of its proper divisors (7886213071).

21232111985 is an equidigital number, since it uses as much as digits as its factorization.

21232111985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606631783.

The product of its digits is 8640, while the sum is 35.

The spelling of 21232111985 in words is "twenty-one billion, two hundred thirty-two million, one hundred eleven thousand, nine hundred eighty-five".