21444312141 has 16 divisors (see below), whose sum is σ = 36307830400. Its totient is φ = 12253892544.

The previous prime is 21444312137. The next prime is 21444312157. The reversal of 21444312141 is 14121344412.

21444312141 is a `hidden beast` number, since 2 + 1 + 4 + 443 + 1 + 214 + 1 = 666.

It is not a de Polignac number, because 21444312141 - 2² = 21444312137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444312101) 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, 56730796 + ... + 56731173.

It is an arithmetic number, because the mean of its divisors is an integer number (2269239400).

Almost surely, 2^21444312141 is an apocalyptic number.

21444312141 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21444312141 is a deficient number, since it is larger than the sum of its proper divisors (14863518259).

21444312141 is a wasteful number, since it uses less digits than its factorization.

21444312141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113461985 (or 113461979 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 21444312141 its reverse (14121344412), we get a palindrome (35565656553).

The spelling of 21444312141 in words is "twenty-one billion, four hundred forty-four million, three hundred twelve thousand, one hundred forty-one".