221021020102102 has 16 divisors (see below), whose sum is σ = 362067764327424. Its totient is φ = 100353821113000.

The previous prime is 221021020102073. The next prime is 221021020102151. The reversal of 221021020102102 is 201201020120122.

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, 5513926174 + ... + 5513966257.

It is an arithmetic number, because the mean of its divisors is an integer number (22629235270464).

Almost surely, 2^{221021020102102} is an apocalyptic number.

221021020102102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221021020102102 is a deficient number, since it is larger than the sum of its proper divisors (141046744225322).

221021020102102 is a wasteful number, since it uses less digits than its factorization.

221021020102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11027893355.

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

Adding to 221021020102102 its reverse (201201020120122), we get a palindrome (422222040222224).

The spelling of 221021020102102 in words is "two hundred twenty-one trillion, twenty-one billion, twenty million, one hundred two thousand, one hundred two".