221312018848 has 96 divisors (see below), whose sum is σ = 475920023040. Its totient is φ = 100951038720.

The previous prime is 221312018819. The next prime is 221312018869. The reversal of 221312018848 is 848810213122.

It is a self number, because there is not a number n which added to its sum of digits gives 221312018848.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1796611 + ... + 1915837.

It is an arithmetic number, because the mean of its divisors is an integer number (4957500240).

Almost surely, 2^221312018848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221312018848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237960011520).

221312018848 is an abundant number, since it is smaller than the sum of its proper divisors (254608004192).

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

221312018848 is a wasteful number, since it uses less digits than its factorization.

221312018848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119370 (or 119362 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The spelling of 221312018848 in words is "two hundred twenty-one billion, three hundred twelve million, eighteen thousand, eight hundred forty-eight".