21444144131412 has 72 divisors (see below), whose sum is σ = 54401805407040. Its totient is φ = 7122268258560.

The previous prime is 21444144131411. The next prime is 21444144131429. The reversal of 21444144131412 is 21413144144412.

21444144131412 is a `hidden beast` number, since 2 + 1 + 4 + 441 + 44 + 131 + 41 + 2 = 666.

It is a super-2 number, since 2×21444144131412² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444144131411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13304748 + ... + 14829180.

Almost surely, 2^{21444144131412} is an apocalyptic number.

It is an amenable number.

21444144131412 is an abundant number, since it is smaller than the sum of its proper divisors (32957661275628).

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

21444144131412 is a wasteful number, since it uses less digits than its factorization.

21444144131412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525853 (or 1525848 counting only the distinct ones).

The product of its digits is 49152, while the sum is 36.

Adding to 21444144131412 its reverse (21413144144412), we get a palindrome (42857288275824).

The spelling of 21444144131412 in words is "twenty-one trillion, four hundred forty-four billion, one hundred forty-four million, one hundred thirty-one thousand, four hundred twelve".