221267579080 has 128 divisors (see below), whose sum is σ = 529612992000. Its totient is φ = 83039523840.

The previous prime is 221267579033. The next prime is 221267579087. The reversal of 221267579080 is 80975762122.

It is not an unprimeable number, because it can be changed into a prime (221267579087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39097291 + ... + 39102949.

It is an arithmetic number, because the mean of its divisors is an integer number (4137601500).

Almost surely, 2^221267579080 is an apocalyptic number.

221267579080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221267579080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264806496000).

221267579080 is an abundant number, since it is smaller than the sum of its proper divisors (308345412920).

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

221267579080 is a wasteful number, since it uses less digits than its factorization.

221267579080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6647 (or 6643 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 221267579080 in words is "two hundred twenty-one billion, two hundred sixty-seven million, five hundred seventy-nine thousand, eighty".