121221202101101 has 16 divisors (see below), whose sum is σ = 128013958949760. Its totient is φ = 114469728468480.

The previous prime is 121221202101089. The next prime is 121221202101107. The reversal of 121221202101101 is 101101202122121.

It is a cyclic number.

It is not a de Polignac number, because 121221202101101 - 2²² = 121221197906797 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 121221202101101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221202101107) by changing a digit.

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, 377879765 + ... + 378200421.

It is an arithmetic number, because the mean of its divisors is an integer number (8000872434360).

Almost surely, 2^{121221202101101} is an apocalyptic number.

It is an amenable number.

121221202101101 is a deficient number, since it is larger than the sum of its proper divisors (6792756848659).

121221202101101 is a wasteful number, since it uses less digits than its factorization.

121221202101101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384964.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121221202101101 its reverse (101101202122121), we get a palindrome (222322404223222).

The spelling of 121221202101101 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred two million, one hundred one thousand, one hundred one".