21034043012 has 12 divisors (see below), whose sum is σ = 38078871180. Its totient is φ = 10154365536.

The previous prime is 21034042993. The next prime is 21034043021.

21034043012 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 6427870276 + 14606172736 = 80174^2 + 120856^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90663863 + ... + 90664094.

It is an arithmetic number, because the mean of its divisors is an integer number (3173239265).

Almost surely, 2^21034043012 is an apocalyptic number.

It is an amenable number.

21034043012 is a deficient number, since it is larger than the sum of its proper divisors (17044828168).

21034043012 is a wasteful number, since it uses less digits than its factorization.

21034043012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181327990 (or 181327988 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

It can be divided in two parts, 210340 and 43012, that added together give a palindrome (253352).

The spelling of 21034043012 in words is "twenty-one billion, thirty-four million, forty-three thousand, twelve".