21144400444112 has 20 divisors (see below), whose sum is σ = 44691573666336. Its totient is φ = 9611091110880.

The previous prime is 21144400444103. The next prime is 21144400444133.

21144400444112 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60069319268 + ... + 60069319619.

Almost surely, 2^{21144400444112} is an apocalyptic number.

21144400444112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21144400444112 is an abundant number, since it is smaller than the sum of its proper divisors (23547173222224).

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

21144400444112 is a wasteful number, since it uses less digits than its factorization.

21144400444112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120138638906 (or 120138638900 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

It can be divided in two parts, 21144400 and 444112, that added together give a palindrome (21588512).

The spelling of 21144400444112 in words is "twenty-one trillion, one hundred forty-four billion, four hundred million, four hundred forty-four thousand, one hundred twelve".