121002211200221 has 16 divisors (see below), whose sum is σ = 136718765772288. Its totient is φ = 106319316657600.

The previous prime is 121002211200203. The next prime is 121002211200313. The reversal of 121002211200221 is 122002112200121.

It is a cyclic number.

It is not a de Polignac number, because 121002211200221 - 2¹⁰ = 121002211199197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121002211200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002211202221) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2461070711 + ... + 2461119876.

It is an arithmetic number, because the mean of its divisors is an integer number (8544922860768).

Almost surely, 2^{121002211200221} is an apocalyptic number.

It is an amenable number.

121002211200221 is a deficient number, since it is larger than the sum of its proper divisors (15716554572067).

121002211200221 is a wasteful number, since it uses less digits than its factorization.

121002211200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4922190692.

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

Adding to 121002211200221 its reverse (122002112200121), we get a palindrome (243004323400342).

The spelling of 121002211200221 in words is "one hundred twenty-one trillion, two billion, two hundred eleven million, two hundred thousand, two hundred twenty-one".