21034020011043 has 16 divisors (see below), whose sum is σ = 30203828802560. Its totient is φ = 12943526570784.

The previous prime is 21034020011033. The next prime is 21034020011047. The reversal of 21034020011043 is 34011002043012.

It is not a de Polignac number, because 21034020011043 - 2³⁰ = 21032946269219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21034020011047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9065683 + ... + 11146956.

It is an arithmetic number, because the mean of its divisors is an integer number (1887739300160).

Almost surely, 2^{21034020011043} is an apocalyptic number.

21034020011043 is a deficient number, since it is larger than the sum of its proper divisors (9169808791517).

21034020011043 is a wasteful number, since it uses less digits than its factorization.

21034020011043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20239338.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21034020011043 its reverse (34011002043012), we get a palindrome (55045022054055).

The spelling of 21034020011043 in words is "twenty-one trillion, thirty-four billion, twenty million, eleven thousand, forty-three".