21244444444212 has 24 divisors (see below), whose sum is σ = 54076767676512. Its totient is φ = 6437710437600.

The previous prime is 21244444444189. The next prime is 21244444444243.

21244444444212 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×21244444444212³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80471380339 + ... + 80471380602.

It is an arithmetic number, because the mean of its divisors is an integer number (2253198653188).

Almost surely, 2^{21244444444212} is an apocalyptic number.

21244444444212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21244444444212 is an abundant number, since it is smaller than the sum of its proper divisors (32832323232300).

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

21244444444212 is a wasteful number, since it uses less digits than its factorization.

21244444444212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160942760959 (or 160942760957 counting only the distinct ones).

The product of its digits is 1048576, while the sum is 42.

It can be divided in two parts, 2124444 and 4444212, that added together give a palindrome (6568656).

The spelling of 21244444444212 in words is "twenty-one trillion, two hundred forty-four billion, four hundred forty-four million, four hundred forty-four thousand, two hundred twelve".