221323210002 has 32 divisors (see below), whose sum is σ = 491981031360. Its totient is φ = 73751652000.

The previous prime is 221323209953. The next prime is 221323210021. The reversal of 221323210002 is 200012323122.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 454803 + ... + 805910.

It is an arithmetic number, because the mean of its divisors is an integer number (15374407230).

Almost surely, 2^221323210002 is an apocalyptic number.

221323210002 is an abundant number, since it is smaller than the sum of its proper divisors (270657821358).

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

221323210002 is a wasteful number, since it uses less digits than its factorization.

221323210002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263975 (or 1263969 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 221323210002 its reverse (200012323122), we get a palindrome (421335533124).

The spelling of 221323210002 in words is "two hundred twenty-one billion, three hundred twenty-three million, two hundred ten thousand, two".