221151694904 has 32 divisors (see below), whose sum is σ = 483567852000. Its totient is φ = 94779296640.

The previous prime is 221151694903. The next prime is 221151694919. The reversal of 221151694904 is 409496151122.

221151694904 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221151694901) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 40294577 + ... + 40300064.

It is an arithmetic number, because the mean of its divisors is an integer number (15111495375).

Almost surely, 2^221151694904 is an apocalyptic number.

It is an amenable number.

221151694904 is an abundant number, since it is smaller than the sum of its proper divisors (262416157096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221151694904 is an equidigital number, since it uses as much as digits as its factorization.

221151694904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80594668 (or 80594650 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 221151694904 in words is "two hundred twenty-one billion, one hundred fifty-one million, six hundred ninety-four thousand, nine hundred four".