221021021092 has 12 divisors (see below), whose sum is σ = 396220611276. Its totient is φ = 107815132160.

The previous prime is 221021021083. The next prime is 221021021113. The reversal of 221021021092 is 290120120122.

221021021092 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 36349710336 + 184671310756 = 190656^2 + 429734^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 673844413 + ... + 673844740.

It is an arithmetic number, because the mean of its divisors is an integer number (33018384273).

Almost surely, 2^221021021092 is an apocalyptic number.

It is an amenable number.

221021021092 is a deficient number, since it is larger than the sum of its proper divisors (175199590184).

221021021092 is a wasteful number, since it uses less digits than its factorization.

221021021092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347689198 (or 1347689196 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 221021021092 in words is "two hundred twenty-one billion, twenty-one million, twenty-one thousand, ninety-two".