221021200196 has 6 divisors (see below), whose sum is σ = 386787100350. Its totient is φ = 110510600096.

The previous prime is 221021200181. The next prime is 221021200229. The reversal of 221021200196 is 691002120122.

It can be written as a sum of positive squares in only one way, i.e., 217855562500 + 3165637696 = 466750^2 + 56264^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27627650021 + ... + 27627650028.

It is an arithmetic number, because the mean of its divisors is an integer number (64464516725).

Almost surely, 2^221021200196 is an apocalyptic number.

It is an amenable number.

221021200196 is a deficient number, since it is larger than the sum of its proper divisors (165765900154).

221021200196 is a wasteful number, since it uses less digits than its factorization.

221021200196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55255300053 (or 55255300051 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 221021200196 in words is "two hundred twenty-one billion, twenty-one million, two hundred thousand, one hundred ninety-six".