221231222032 has 160 divisors (see below), whose sum is σ = 500102277120. Its totient is φ = 94039418880.

The previous prime is 221231222027. The next prime is 221231222077. The reversal of 221231222032 is 230222132122.

It is a junction number, because it is equal to n+sod(n) for n = 221231221994 and 221231222012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39341173 + ... + 39346795.

It is an arithmetic number, because the mean of its divisors is an integer number (3125639232).

Almost surely, 2^221231222032 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 221231222032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250051138560).

221231222032 is an abundant number, since it is smaller than the sum of its proper divisors (278871055088).

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

221231222032 is a wasteful number, since it uses less digits than its factorization.

221231222032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6021 (or 6015 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 221231222032 its reverse (230222132122), we get a palindrome (451453354154).

The spelling of 221231222032 in words is "two hundred twenty-one billion, two hundred thirty-one million, two hundred twenty-two thousand, thirty-two".