221989405124 has 48 divisors (see below), whose sum is σ = 401232542256. Its totient is φ = 107386675200.

The previous prime is 221989405111. The next prime is 221989405147. The reversal of 221989405124 is 421504989122.

221989405124 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 8 ways, for example, as 3461204224 + 218528200900 = 58832^2 + 467470^2 .

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 15 ways as a sum of consecutive naturals, for example, 28307444 + ... + 28315284.

It is an arithmetic number, because the mean of its divisors is an integer number (8359011297).

Almost surely, 2^221989405124 is an apocalyptic number.

It is an amenable number.

221989405124 is a deficient number, since it is larger than the sum of its proper divisors (179243137132).

221989405124 is a wasteful number, since it uses less digits than its factorization.

221989405124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8936 (or 8934 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 221989405124 in words is "two hundred twenty-one billion, nine hundred eighty-nine million, four hundred five thousand, one hundred twenty-four".