221130321000 has 128 divisors (see below), whose sum is σ = 693198380160. Its totient is φ = 58688448000.

The previous prime is 221130320951. The next prime is 221130321017. The reversal of 221130321000 is 123031122.

It is a super-3 number, since 3×221130321000³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 458332 + ... + 807668.

It is an arithmetic number, because the mean of its divisors is an integer number (5415612345).

Almost surely, 2^221130321000 is an apocalyptic number.

221130321000 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 221130321000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346599190080).

221130321000 is an abundant number, since it is smaller than the sum of its proper divisors (472068059160).

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

221130321000 is a wasteful number, since it uses less digits than its factorization.

221130321000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349572 (or 349558 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 221130321000 its reverse (123031122), we get a palindrome (221253352122).

The spelling of 221130321000 in words is "two hundred twenty-one billion, one hundred thirty million, three hundred twenty-one thousand".