221021301202102 has 32 divisors (see below), whose sum is σ = 341543441606400. Its totient is φ = 107208462301920.

The previous prime is 221021301202087. The next prime is 221021301202123. The reversal of 221021301202102 is 201202103120122.

It is a self number, because there is not a number n which added to its sum of digits gives 221021301202102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178921423 + ... + 180152485.

It is an arithmetic number, because the mean of its divisors is an integer number (10673232550200).

Almost surely, 2^{221021301202102} is an apocalyptic number.

221021301202102 is a deficient number, since it is larger than the sum of its proper divisors (120522140404298).

221021301202102 is a wasteful number, since it uses less digits than its factorization.

221021301202102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245268.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221021301202102 its reverse (201202103120122), we get a palindrome (422223404322224).

The spelling of 221021301202102 in words is "two hundred twenty-one trillion, twenty-one billion, three hundred one million, two hundred two thousand, one hundred two".