221140120 has 32 divisors (see below), whose sum is σ = 511016400. Its totient is φ = 86064768.

The previous prime is 221140111. The next prime is 221140121. The reversal of 221140120 is 21041122.

It is a happy number.

It is a super-2 number, since 2×221140120² = 97805905347228800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221140120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221140121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73230 + ... + 76189.

Almost surely, 2^221140120 is an apocalyptic number.

221140120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221140120 is an abundant number, since it is smaller than the sum of its proper divisors (289876280).

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

221140120 is a wasteful number, since it uses less digits than its factorization.

221140120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149467 (or 149463 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 221140120 is about 14870.7807461478. The cubic root of 221140120 is about 604.7221090190.

Adding to 221140120 its reverse (21041122), we get a palindrome (242181242).

The spelling of 221140120 in words is "two hundred twenty-one million, one hundred forty thousand, one hundred twenty".