21814122952112 has 80 divisors (see below), whose sum is σ = 44033160864000. Its totient is φ = 10457278018560.

The previous prime is 21814122952009. The next prime is 21814122952117. The reversal of 21814122952112 is 21125922141812.

It is a self number, because there is not a number n which added to its sum of digits gives 21814122952112.

It is not an unprimeable number, because it can be changed into a prime (21814122952117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764937278 + ... + 764965794.

It is an arithmetic number, because the mean of its divisors is an integer number (550414510800).

Almost surely, 2^{21814122952112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21814122952112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22016580432000).

21814122952112 is an abundant number, since it is smaller than the sum of its proper divisors (22219037911888).

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

21814122952112 is a wasteful number, since it uses less digits than its factorization.

21814122952112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42814 (or 42808 counting only the distinct ones).

The product of its digits is 46080, while the sum is 41.

The spelling of 21814122952112 in words is "twenty-one trillion, eight hundred fourteen billion, one hundred twenty-two million, nine hundred fifty-two thousand, one hundred twelve".