221323323000 has 256 divisors, whose sum is σ = 787392627840. Its totient is φ = 51274752000.

The previous prime is 221323322981. The next prime is 221323323073. The reversal of 221323323000 is 323323122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 496090 + ... + 829910.

Almost surely, 2^221323323000 is an apocalyptic number.

221323323000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221323323000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393696313920).

221323323000 is an abundant number, since it is smaller than the sum of its proper divisors (566069304840).

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

221323323000 is a wasteful number, since it uses less digits than its factorization.

221323323000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333875 (or 333861 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 221323323000 its reverse (323323122), we get a palindrome (221646646122).

The spelling of 221323323000 in words is "two hundred twenty-one billion, three hundred twenty-three million, three hundred twenty-three thousand".