221657221402984 has 64 divisors (see below), whose sum is σ = 425832617779200. Its totient is φ = 108141658619904.

The previous prime is 221657221402933. The next prime is 221657221403021. The reversal of 221657221402984 is 489204122756122.

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 in 15 ways as a sum of consecutive naturals, for example, 15255082 + ... + 26000614.

It is an arithmetic number, because the mean of its divisors is an integer number (6653634652800).

Almost surely, 2^{221657221402984} is an apocalyptic number.

It is an amenable number.

221657221402984 is a deficient number, since it is larger than the sum of its proper divisors (204175396376216).

221657221402984 is a wasteful number, since it uses less digits than its factorization.

221657221402984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10746002 (or 10745998 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 221657221402984 in words is "two hundred twenty-one trillion, six hundred fifty-seven billion, two hundred twenty-one million, four hundred two thousand, nine hundred eighty-four".