21543035312110 has 16 divisors (see below), whose sum is σ = 41760345374496. Its totient is φ = 7954351499808.

The previous prime is 21543035312069. The next prime is 21543035312111. The reversal of 21543035312110 is 1121353034512.

It is a super-2 number, since 2×21543035312110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21543035312111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82857827994 + ... + 82857828253.

It is an arithmetic number, because the mean of its divisors is an integer number (2610021585906).

Almost surely, 2^{21543035312110} is an apocalyptic number.

21543035312110 is a deficient number, since it is larger than the sum of its proper divisors (20217310062386).

21543035312110 is a wasteful number, since it uses less digits than its factorization.

21543035312110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165715656267.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 21543035312110 its reverse (1121353034512), we get a palindrome (22664388346622).

The spelling of 21543035312110 in words is "twenty-one trillion, five hundred forty-three billion, thirty-five million, three hundred twelve thousand, one hundred ten".