221240234120 has 32 divisors (see below), whose sum is σ = 507182805720. Its totient is φ = 86826355200.

The previous prime is 221240234101. The next prime is 221240234141. The reversal of 221240234120 is 21432042122.

It can be written as a sum of positive squares in 4 ways, for example, as 219430412356 + 1809821764 = 468434^2 + 42542^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52177181 + ... + 52181420.

Almost surely, 2^221240234120 is an apocalyptic number.

221240234120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221240234120 is an abundant number, since it is smaller than the sum of its proper divisors (285942571600).

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

221240234120 is a wasteful number, since it uses less digits than its factorization.

221240234120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104358665 (or 104358661 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 221240234120 its reverse (21432042122), we get a palindrome (242672276242).

The spelling of 221240234120 in words is "two hundred twenty-one billion, two hundred forty million, two hundred thirty-four thousand, one hundred twenty".