21443255234412 has 96 divisors (see below), whose sum is σ = 55615334261760. Its totient is φ = 6375050772480.

The previous prime is 21443255234411. The next prime is 21443255234417.

21443255234412 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (21443255234411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178918764 + ... + 179038572.

It is an arithmetic number, because the mean of its divisors is an integer number (579326398560).

Almost surely, 2^{21443255234412} is an apocalyptic number.

21443255234412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21443255234412 is an abundant number, since it is smaller than the sum of its proper divisors (34172079027348).

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

21443255234412 is a wasteful number, since it uses less digits than its factorization.

21443255234412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145463 (or 145461 counting only the distinct ones).

The product of its digits is 921600, while the sum is 42.

It can be divided in two parts, 2144325 and 5234412, that added together give a palindrome (7378737).

The spelling of 21443255234412 in words is "twenty-one trillion, four hundred forty-three billion, two hundred fifty-five million, two hundred thirty-four thousand, four hundred twelve".