21125143073353 has 16 divisors (see below), whose sum is σ = 23793586145280. Its totient is φ = 18588739075200.

The previous prime is 21125143073323. The next prime is 21125143073389. The reversal of 21125143073353 is 35337034152112.

It is a cyclic number.

It is not a de Polignac number, because 21125143073353 - 2²¹ = 21125140976201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21125143073323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184354818 + ... + 184469371.

It is an arithmetic number, because the mean of its divisors is an integer number (1487099134080).

Almost surely, 2^{21125143073353} is an apocalyptic number.

It is an amenable number.

21125143073353 is a deficient number, since it is larger than the sum of its proper divisors (2668443071927).

21125143073353 is a wasteful number, since it uses less digits than its factorization.

21125143073353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368824368.

The product of its (nonzero) digits is 226800, while the sum is 40.

The spelling of 21125143073353 in words is "twenty-one trillion, one hundred twenty-five billion, one hundred forty-three million, seventy-three thousand, three hundred fifty-three".