221020210102102 has 16 divisors (see below), whose sum is σ = 345613206225024. Its totient is φ = 105886398960000.

The previous prime is 221020210102093. The next prime is 221020210102123. The reversal of 221020210102102 is 201201012020122.

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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17647726899 + ... + 17647739422.

It is an arithmetic number, because the mean of its divisors is an integer number (21600825389064).

Almost surely, 2^{221020210102102} is an apocalyptic number.

221020210102102 is a deficient number, since it is larger than the sum of its proper divisors (124592996122922).

221020210102102 is a wasteful number, since it uses less digits than its factorization.

221020210102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35295466455.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221020210102102 its reverse (201201012020122), we get a palindrome (422221222122224).

The spelling of 221020210102102 in words is "two hundred twenty-one trillion, twenty billion, two hundred ten million, one hundred two thousand, one hundred two".