21120221185793 has 8 divisors (see below), whose sum is σ = 21143017688640. Its totient is φ = 21097436981040.

The previous prime is 21120221185787. The next prime is 21120221185837. The reversal of 21120221185793 is 39758112202112.

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 21120221185793 - 2¹⁴ = 21120221169409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120221185783) 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 7 ways as a sum of consecutive naturals, for example, 364118 + ... + 6509456.

It is an arithmetic number, because the mean of its divisors is an integer number (2642877211080).

Almost surely, 2^{21120221185793} is an apocalyptic number.

It is an amenable number.

21120221185793 is a deficient number, since it is larger than the sum of its proper divisors (22796502847).

21120221185793 is a wasteful number, since it uses less digits than its factorization.

21120221185793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6149047.

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 21120221185793 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-one million, one hundred eighty-five thousand, seven hundred ninety-three".