21622152112 has 120 divisors (see below), whose sum is σ = 47094555200. Its totient is φ = 9607403520.

The previous prime is 21622152109. The next prime is 21622152119. The reversal of 21622152112 is 21125122612.

It is not an unprimeable number, because it can be changed into a prime (21622152119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16670248 + ... + 16671544.

Almost surely, 2^21622152112 is an apocalyptic number.

21622152112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21622152112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23547277600).

21622152112 is an abundant number, since it is smaller than the sum of its proper divisors (25472403088).

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

21622152112 is a wasteful number, since it uses less digits than its factorization.

21622152112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515 (or 1498 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

Adding to 21622152112 its reverse (21125122612), we get a palindrome (42747274724).

The spelling of 21622152112 in words is "twenty-one billion, six hundred twenty-two million, one hundred fifty-two thousand, one hundred twelve".