221240120 has 32 divisors (see below), whose sum is σ = 498672720. Its totient is φ = 88339200.

The previous prime is 221240119. The next prime is 221240143. The reversal of 221240120 is 21042122.

It is a super-2 number, since 2×221240120² = 97894381395228800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221240095 and 221240104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19439 + ... + 28641.

Almost surely, 2^221240120 is an apocalyptic number.

221240120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221240120 is an abundant number, since it is smaller than the sum of its proper divisors (277432600).

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

221240120 is a wasteful number, since it uses less digits than its factorization.

221240120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9815 (or 9811 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 221240120 is about 14874.1426643689. The cubic root of 221240120 is about 604.8132474609.

Adding to 221240120 its reverse (21042122), we get a palindrome (242282242).

The spelling of 221240120 in words is "two hundred twenty-one million, two hundred forty thousand, one hundred twenty".