221020102 has 8 divisors (see below), whose sum is σ = 332514936. Its totient is φ = 110181792.

The previous prime is 221020099. The next prime is 221020127. The reversal of 221020102 is 201020122.

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

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 3 ways as a sum of consecutive naturals, for example, 163288 + ... + 164635.

It is an arithmetic number, because the mean of its divisors is an integer number (41564367).

Almost surely, 2^221020102 is an apocalyptic number.

221020102 is a deficient number, since it is larger than the sum of its proper divisors (111494834).

221020102 is a wasteful number, since it uses less digits than its factorization.

221020102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328262.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 221020102 is about 14866.7448353700. The cubic root of 221020102 is about 604.6126902006.

Adding to 221020102 its reverse (201020122), we get a palindrome (422040224).

It can be divided in two parts, 221020 and 102, that added together give a palindrome (221122).

The spelling of 221020102 in words is "two hundred twenty-one million, twenty thousand, one hundred two".