21331042144412 has 384 divisors, whose sum is σ = 51185727774720. Its totient is φ = 7510468008960.

The previous prime is 21331042144361. The next prime is 21331042144427. The reversal of 21331042144412 is 21444124013312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 32368804139 + ... + 32368804797.

It is an arithmetic number, because the mean of its divisors is an integer number (133296166080).

Almost surely, 2^{21331042144412} is an apocalyptic number.

21331042144412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21331042144412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25592863887360).

21331042144412 is an abundant number, since it is smaller than the sum of its proper divisors (29854685630308).

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

21331042144412 is a wasteful number, since it uses less digits than its factorization.

21331042144412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513 (or 1511 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 21331042144412 its reverse (21444124013312), we get a palindrome (42775166157724).

The spelling of 21331042144412 in words is "twenty-one trillion, three hundred thirty-one billion, forty-two million, one hundred forty-four thousand, four hundred twelve".