221201647152 has 160 divisors (see below), whose sum is σ = 602553219840. Its totient is φ = 69846266880.

The previous prime is 221201647151. The next prime is 221201647201. The reversal of 221201647152 is 251746102122.

It is a super-2 number, since 2×221201647152² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221201647151) 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, 12321799 + ... + 12339737.

It is an arithmetic number, because the mean of its divisors is an integer number (3765957624).

Almost surely, 2^221201647152 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 221201647152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301276609920).

221201647152 is an abundant number, since it is smaller than the sum of its proper divisors (381351572688).

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

221201647152 is a wasteful number, since it uses less digits than its factorization.

221201647152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18171 (or 18165 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

Adding to 221201647152 its reverse (251746102122), we get a palindrome (472947749274).

The spelling of 221201647152 in words is "two hundred twenty-one billion, two hundred one million, six hundred forty-seven thousand, one hundred fifty-two".