221232112120 has 64 divisors (see below), whose sum is σ = 509438730240. Its totient is φ = 86419536000.

The previous prime is 221232112117. The next prime is 221232112121. The reversal of 221232112120 is 21211232122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232112121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17453385 + ... + 17466055.

It is an arithmetic number, because the mean of its divisors is an integer number (7959980160).

Almost surely, 2^221232112120 is an apocalyptic number.

221232112120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221232112120 is an abundant number, since it is smaller than the sum of its proper divisors (288206618120).

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

221232112120 is a wasteful number, since it uses less digits than its factorization.

221232112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22876 (or 22872 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221232112120 its reverse (21211232122), we get a palindrome (242443344242).

The spelling of 221232112120 in words is "two hundred twenty-one billion, two hundred thirty-two million, one hundred twelve thousand, one hundred twenty".