21431066013412 has 24 divisors (see below), whose sum is σ = 42692716487232. Its totient is φ = 9317854788000.

The previous prime is 21431066013403. The next prime is 21431066013463.

21431066013412 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10588470339 + ... + 10588472362.

It is an arithmetic number, because the mean of its divisors is an integer number (1778863186968).

Almost surely, 2^{21431066013412} is an apocalyptic number.

21431066013412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21431066013412 is a deficient number, since it is larger than the sum of its proper divisors (21261650473820).

21431066013412 is a wasteful number, since it uses less digits than its factorization.

21431066013412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21176942739 (or 21176942737 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

It can be divided in two parts, 2143106 and 6013412, that added together give a palindrome (8156518).

The spelling of 21431066013412 in words is "twenty-one trillion, four hundred thirty-one billion, sixty-six million, thirteen thousand, four hundred twelve".