221000021192 has 8 divisors (see below), whose sum is σ = 414375039750. Its totient is φ = 110500010592.

The previous prime is 221000021161. The next prime is 221000021201. The reversal of 221000021192 is 291120000122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 133352050276 + 87647970916 = 365174^2 + 296054^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13812501317 + ... + 13812501332.

Almost surely, 2^221000021192 is an apocalyptic number.

It is an amenable number.

221000021192 is a deficient number, since it is larger than the sum of its proper divisors (193375018558).

221000021192 is a wasteful number, since it uses less digits than its factorization.

221000021192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27625002655 (or 27625002651 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 221000021192 in words is "two hundred twenty-one billion, twenty-one thousand, one hundred ninety-two".