121221020201099 has 24 divisors (see below), whose sum is σ = 153939564475200. Its totient is φ = 94597285636224.

The previous prime is 121221020201053. The next prime is 121221020201137. The reversal of 121221020201099 is 990102020122121.

It is a de Polignac number, because none of the positive numbers 2^k-121221020201099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121221020200099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1303377299 + ... + 1303470300.

It is an arithmetic number, because the mean of its divisors is an integer number (6414148519800).

Almost surely, 2^{121221020201099} is an apocalyptic number.

121221020201099 is a deficient number, since it is larger than the sum of its proper divisors (32718544274101).

121221020201099 is a wasteful number, since it uses less digits than its factorization.

121221020201099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606847699 (or 2606847692 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 121221020201099 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred one thousand, ninety-nine".