221323210116 has 72 divisors (see below), whose sum is σ = 529895114112. Its totient is φ = 71897337600.

The previous prime is 221323210037. The next prime is 221323210117. The reversal of 221323210116 is 611012323122.

It is not an unprimeable number, because it can be changed into a prime (221323210117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20428821 + ... + 20439651.

Almost surely, 2^221323210116 is an apocalyptic number.

It is an amenable number.

221323210116 is an abundant number, since it is smaller than the sum of its proper divisors (308571903996).

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

221323210116 is a wasteful number, since it uses less digits than its factorization.

221323210116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11933 (or 11890 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 221323210116 its reverse (611012323122), we get a palindrome (832335533238).

The spelling of 221323210116 in words is "two hundred twenty-one billion, three hundred twenty-three million, two hundred ten thousand, one hundred sixteen".