121320202113 has 48 divisors (see below), whose sum is σ = 198968567616. Its totient is φ = 73261506240.

The previous prime is 121320202063. The next prime is 121320202141. The reversal of 121320202113 is 311202023121.

It is not a de Polignac number, because 121320202113 - 2⁹ = 121320201601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121320202013) 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 47 ways as a sum of consecutive naturals, for example, 658495 + ... + 822347.

It is an arithmetic number, because the mean of its divisors is an integer number (4145178492).

Almost surely, 2^121320202113 is an apocalyptic number.

It is an amenable number.

121320202113 is a deficient number, since it is larger than the sum of its proper divisors (77648365503).

121320202113 is a wasteful number, since it uses less digits than its factorization.

121320202113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164156 (or 164144 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121320202113 its reverse (311202023121), we get a palindrome (432522225234).

The spelling of 121320202113 in words is "one hundred twenty-one billion, three hundred twenty million, two hundred two thousand, one hundred thirteen".