221144354120 has 16 divisors (see below), whose sum is σ = 497574796860. Its totient is φ = 88457741632.

The previous prime is 221144354083. The next prime is 221144354131. The reversal of 221144354120 is 21453441122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 214333813444 + 6810540676 = 462962^2 + 82526^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2764304387 + ... + 2764304466.

Almost surely, 2^221144354120 is an apocalyptic number.

221144354120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221144354120 is an abundant number, since it is smaller than the sum of its proper divisors (276430442740).

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

221144354120 is a wasteful number, since it uses less digits than its factorization.

221144354120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5528608864 (or 5528608860 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 221144354120 its reverse (21453441122), we get a palindrome (242597795242).

The spelling of 221144354120 in words is "two hundred twenty-one billion, one hundred forty-four million, three hundred fifty-four thousand, one hundred twenty".