10543423421421 has 12 divisors (see below), whose sum is σ = 16613879330880. Its totient is φ = 6389953588680.

The previous prime is 10543423421383. The next prime is 10543423421423. The reversal of 10543423421421 is 12412432434501.

10543423421421 is a `hidden beast` number, since 1 + 0 + 5 + 434 + 2 + 3 + 4 + 214 + 2 + 1 = 666.

It is not a de Polignac number, because 10543423421421 - 2⁹ = 10543423420909 is a prime.

It is a super-2 number, since 2×10543423421421² (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 (10543423421423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53249613141 + ... + 53249613338.

It is an arithmetic number, because the mean of its divisors is an integer number (1384489944240).

Almost surely, 2^{10543423421421} is an apocalyptic number.

10543423421421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10543423421421 is a deficient number, since it is larger than the sum of its proper divisors (6070455909459).

10543423421421 is a wasteful number, since it uses less digits than its factorization.

10543423421421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106499226496 (or 106499226493 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

Adding to 10543423421421 its reverse (12412432434501), we get a palindrome (22955855855922).

The spelling of 10543423421421 in words is "ten trillion, five hundred forty-three billion, four hundred twenty-three million, four hundred twenty-one thousand, four hundred twenty-one".