210001221222101 has 8 divisors (see below), whose sum is σ = 215442744867840. Its totient is φ = 204629016349152.

The previous prime is 210001221222007. The next prime is 210001221222167. The reversal of 210001221222101 is 101222122100012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210001221222101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210001221222101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001221227101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17329687061 + ... + 17329699178.

It is an arithmetic number, because the mean of its divisors is an integer number (26930343108480).

Almost surely, 2^{210001221222101} is an apocalyptic number.

It is an amenable number.

210001221222101 is a deficient number, since it is larger than the sum of its proper divisors (5441523645739).

210001221222101 is an equidigital number, since it uses as much as digits as its factorization.

210001221222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34659386395.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210001221222101 its reverse (101222122100012), we get a palindrome (311223343322113).

The spelling of 210001221222101 in words is "two hundred ten trillion, one billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred one".