221241100 has 36 divisors (see below), whose sum is σ = 486685864. Its totient is φ = 87281280.

The previous prime is 221241089. The next prime is 221241113. The reversal of 221241100 is 1142122.

It is a happy number.

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 11 ways as a sum of consecutive naturals, for example, 7854 + ... + 22453.

Almost surely, 2^221241100 is an apocalyptic number.

221241100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221241100 is an abundant number, since it is smaller than the sum of its proper divisors (265444764).

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

221241100 is a wasteful number, since it uses less digits than its factorization.

221241100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30394 (or 30387 counting only the distinct ones).

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

The square root of 221241100 is about 14874.1756074076. The cubic root of 221241100 is about 604.8141404817.

Adding to 221241100 its reverse (1142122), we get a palindrome (222383222).

The spelling of 221241100 in words is "two hundred twenty-one million, two hundred forty-one thousand, one hundred".