20321231231112 has 128 divisors (see below), whose sum is σ = 61454146790400. Its totient is φ = 5470094073600.

The previous prime is 20321231231071. The next prime is 20321231231137. The reversal of 20321231231112 is 21113213212302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17008714 + ... + 18164217.

It is an arithmetic number, because the mean of its divisors is an integer number (480110521800).

Almost surely, 2^{20321231231112} is an apocalyptic number.

It is an amenable number.

20321231231112 is an abundant number, since it is smaller than the sum of its proper divisors (41132915559288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20321231231112 is a wasteful number, since it uses less digits than its factorization.

20321231231112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35173147 (or 35173143 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 20321231231112 its reverse (21113213212302), we get a palindrome (41434444443414).

The spelling of 20321231231112 in words is "twenty trillion, three hundred twenty-one billion, two hundred thirty-one million, two hundred thirty-one thousand, one hundred twelve".