21411312242144 has 48 divisors (see below), whose sum is σ = 45992283998976. Its totient is φ = 9731012592000.

The previous prime is 21411312242119. The next prime is 21411312242147. The reversal of 21411312242144 is 44124221311412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 21411312242144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411312242147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1932632 + ... + 6823319.

It is an arithmetic number, because the mean of its divisors is an integer number (958172583312).

Almost surely, 2^{21411312242144} is an apocalyptic number.

It is an amenable number.

21411312242144 is an abundant number, since it is smaller than the sum of its proper divisors (24580971756832).

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

21411312242144 is a wasteful number, since it uses less digits than its factorization.

21411312242144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8762919 (or 8762911 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

Adding to 21411312242144 its reverse (44124221311412), we get a palindrome (65535533553556).

The spelling of 21411312242144 in words is "twenty-one trillion, four hundred eleven billion, three hundred twelve million, two hundred forty-two thousand, one hundred forty-four".