221331313032 has 16 divisors (see below), whose sum is σ = 553328282640. Its totient is φ = 73777104336.

The previous prime is 221331313019. The next prime is 221331313037. The reversal of 221331313032 is 230313133122.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 9222138043 = 221331313032 / (2 + 2 + 1 + 3 + 3 + 1 + 3 + 1 + 3 + 0 + 3 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 221331312993 and 221331313011.

It is not an unprimeable number, because it can be changed into a prime (221331313037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4611068998 + ... + 4611069045.

It is an arithmetic number, because the mean of its divisors is an integer number (34583017665).

Almost surely, 2^221331313032 is an apocalyptic number.

It is an amenable number.

221331313032 is an abundant number, since it is smaller than the sum of its proper divisors (331996969608).

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

221331313032 is a wasteful number, since it uses less digits than its factorization.

221331313032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9222138052 (or 9222138048 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 221331313032 its reverse (230313133122), we get a palindrome (451644446154).

The spelling of 221331313032 in words is "two hundred twenty-one billion, three hundred thirty-one million, three hundred thirteen thousand, thirty-two".