21043140014442 has 128 divisors (see below), whose sum is σ = 53250939076608. Its totient is φ = 5395784544000.

The previous prime is 21043140014437. The next prime is 21043140014471. The reversal of 21043140014442 is 24441004134012.

It is a happy number.

It is a super-4 number, since 4×21043140014442⁴ (a number of 54 digits) contains 4444 as substring.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1159692 + ... + 6590232.

It is an arithmetic number, because the mean of its divisors is an integer number (416022961536).

Almost surely, 2^{21043140014442} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21043140014442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26625469538304).

21043140014442 is an abundant number, since it is smaller than the sum of its proper divisors (32207799062166).

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

21043140014442 is a wasteful number, since it uses less digits than its factorization.

21043140014442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5430764.

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 21043140014442 its reverse (24441004134012), we get a palindrome (45484144148454).

The spelling of 21043140014442 in words is "twenty-one trillion, forty-three billion, one hundred forty million, fourteen thousand, four hundred forty-two".