221400324220 has 12 divisors (see below), whose sum is σ = 464940680904. Its totient is φ = 88560129680.

The previous prime is 221400324203. The next prime is 221400324221. The reversal of 221400324220 is 22423004122.

It is a super-2 number, since 2×221400324220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221400324191 and 221400324200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221400324221) 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, 5535008086 + ... + 5535008125.

It is an arithmetic number, because the mean of its divisors is an integer number (38745056742).

Almost surely, 2^221400324220 is an apocalyptic number.

221400324220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221400324220 is an abundant number, since it is smaller than the sum of its proper divisors (243540356684).

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

221400324220 is a wasteful number, since it uses less digits than its factorization.

221400324220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11070016220 (or 11070016218 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 221400324220 its reverse (22423004122), we get a palindrome (243823328342).

The spelling of 221400324220 in words is "two hundred twenty-one billion, four hundred million, three hundred twenty-four thousand, two hundred twenty".