21440212541412 has 96 divisors (see below), whose sum is σ = 58690061875200. Its totient is φ = 6089093529120.

The previous prime is 21440212541401. The next prime is 21440212541413. The reversal of 21440212541412 is 21414521204412.

It is a happy number.

It is a super-3 number, since 3×21440212541412³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21440212541413) 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, 14908414 + ... + 16283157.

It is an arithmetic number, because the mean of its divisors is an integer number (611354811200).

Almost surely, 2^{21440212541412} is an apocalyptic number.

It is an amenable number.

21440212541412 is an abundant number, since it is smaller than the sum of its proper divisors (37249849333788).

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

21440212541412 is a wasteful number, since it uses less digits than its factorization.

21440212541412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31191766 (or 31191750 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 33.

Adding to 21440212541412 its reverse (21414521204412), we get a palindrome (42854733745824).

The spelling of 21440212541412 in words is "twenty-one trillion, four hundred forty billion, two hundred twelve million, five hundred forty-one thousand, four hundred twelve".