21043112026 has 8 divisors (see below), whose sum is σ = 31575961620. Its totient is φ = 10517791488.

The previous prime is 21043112011. The next prime is 21043112039. The reversal of 21043112026 is 62021134012.

It can be written as a sum of positive squares in 2 ways, for example, as 17794226025 + 3248886001 = 133395^2 + 56999^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21043111988 and 21043112006.

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, 1875271 + ... + 1886458.

Almost surely, 2^21043112026 is an apocalyptic number.

21043112026 is a deficient number, since it is larger than the sum of its proper divisors (10532849594).

21043112026 is a wasteful number, since it uses less digits than its factorization.

21043112026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3764528.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21043112026 its reverse (62021134012), we get a palindrome (83064246038).

The spelling of 21043112026 in words is "twenty-one billion, forty-three million, one hundred twelve thousand, twenty-six".