221321102 has 4 divisors (see below), whose sum is σ = 331981656. Its totient is φ = 110660550.

The previous prime is 221321053. The next prime is 221321119. The reversal of 221321102 is 201123122.

It is a happy number.

221321102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55330274 + ... + 55330277.

It is an arithmetic number, because the mean of its divisors is an integer number (82995414).

Almost surely, 2^221321102 is an apocalyptic number.

221321102 is a deficient number, since it is larger than the sum of its proper divisors (110660554).

221321102 is a wasteful number, since it uses less digits than its factorization.

221321102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110660553.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 221321102 is about 14876.8646562372. The cubic root of 221321102 is about 604.8870330708.

Adding to 221321102 its reverse (201123122), we get a palindrome (422444224).

The spelling of 221321102 in words is "two hundred twenty-one million, three hundred twenty-one thousand, one hundred two".