221440102 has 8 divisors (see below), whose sum is σ = 357710976. Its totient is φ = 102203112.

The previous prime is 221440073. The next prime is 221440103. The reversal of 221440102 is 201044122.

221440102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221440103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4258438 + ... + 4258489.

It is an arithmetic number, because the mean of its divisors is an integer number (44713872).

Almost surely, 2^221440102 is an apocalyptic number.

221440102 is a deficient number, since it is larger than the sum of its proper divisors (136270874).

221440102 is a wasteful number, since it uses less digits than its factorization.

221440102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8516942.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 221440102 is about 14880.8636174115. The cubic root of 221440102 is about 604.9954255966.

Adding to 221440102 its reverse (201044122), we get a palindrome (422484224).

The spelling of 221440102 in words is "two hundred twenty-one million, four hundred forty thousand, one hundred two".