188221264021 has 16 divisors (see below), whose sum is σ = 215393651584. Its totient is φ = 161119917504.

The previous prime is 188221264013. The next prime is 188221264069. The reversal of 188221264021 is 120462122881.

188221264021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 188221264021 - 2³ = 188221264013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188221264321) 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, 37739890 + ... + 37744876.

It is an arithmetic number, because the mean of its divisors is an integer number (13462103224).

Almost surely, 2^188221264021 is an apocalyptic number.

It is an amenable number.

188221264021 is a deficient number, since it is larger than the sum of its proper divisors (27172387563).

188221264021 is a wasteful number, since it uses less digits than its factorization.

188221264021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11020.

The product of its (nonzero) digits is 24576, while the sum is 37.

The spelling of 188221264021 in words is "one hundred eighty-eight billion, two hundred twenty-one million, two hundred sixty-four thousand, twenty-one".