121201100200221 has 16 divisors (see below), whose sum is σ = 161773861740288. Its totient is φ = 80714546395200.

The previous prime is 121201100200133. The next prime is 121201100200249. The reversal of 121201100200221 is 122002001102121.

It is not a de Polignac number, because 121201100200221 - 2⁷ = 121201100200093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121201100200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201600200221) 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, 45947811 + ... + 48513951.

It is an arithmetic number, because the mean of its divisors is an integer number (10110866358768).

Almost surely, 2^{121201100200221} is an apocalyptic number.

It is an amenable number.

121201100200221 is a deficient number, since it is larger than the sum of its proper divisors (40572761540067).

121201100200221 is a wasteful number, since it uses less digits than its factorization.

121201100200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582932.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121201100200221 its reverse (122002001102121), we get a palindrome (243203101302342).

The spelling of 121201100200221 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred million, two hundred thousand, two hundred twenty-one".