21161002254323 has 8 divisors (see below), whose sum is σ = 21685529612880. Its totient is φ = 20636875150720.

The previous prime is 21161002254319. The next prime is 21161002254367. The reversal of 21161002254323 is 32345220016112.

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

It is a cyclic number.

It is not a de Polignac number, because 21161002254323 - 2² = 21161002254319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21161002254323.

It is not an unprimeable number, because it can be changed into a prime (21161002254373) 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, 99956690 + ... + 100168167.

It is an arithmetic number, because the mean of its divisors is an integer number (2710691201610).

Almost surely, 2^{21161002254323} is an apocalyptic number.

21161002254323 is a deficient number, since it is larger than the sum of its proper divisors (524527358557).

21161002254323 is a wasteful number, since it uses less digits than its factorization.

21161002254323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200127477.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 21161002254323 in words is "twenty-one trillion, one hundred sixty-one billion, two million, two hundred fifty-four thousand, three hundred twenty-three".