21234433443212 has 48 divisors (see below), whose sum is σ = 41211977412480. Its totient is φ = 9492134256000.

The previous prime is 21234433443149. The next prime is 21234433443229.

21234433443212 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4220762 + ... + 7764257.

It is an arithmetic number, because the mean of its divisors is an integer number (858582862760).

Almost surely, 2^{21234433443212} is an apocalyptic number.

21234433443212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21234433443212 is a deficient number, since it is larger than the sum of its proper divisors (19977543969268).

21234433443212 is a wasteful number, since it uses less digits than its factorization.

21234433443212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11985702 (or 11985700 counting only the distinct ones).

The product of its digits is 331776, while the sum is 38.

It can be divided in two parts, 2123443 and 3443212, that added together give a palindrome (5566655).

The spelling of 21234433443212 in words is "twenty-one trillion, two hundred thirty-four billion, four hundred thirty-three million, four hundred forty-three thousand, two hundred twelve".