121513440121 has 32 divisors (see below), whose sum is σ = 129242234880. Its totient is φ = 114072235200.

The previous prime is 121513440077. The next prime is 121513440143. The reversal of 121513440121 is 121044315121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121513440121 - 2¹¹ = 121513438073 is a prime.

It is a super-2 number, since 2×121513440121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121513440721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95005960 + ... + 95007238.

It is an arithmetic number, because the mean of its divisors is an integer number (4038819840).

Almost surely, 2^121513440121 is an apocalyptic number.

It is an amenable number.

121513440121 is a deficient number, since it is larger than the sum of its proper divisors (7728794759).

121513440121 is a wasteful number, since it uses less digits than its factorization.

121513440121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 121513440121 its reverse (121044315121), we get a palindrome (242557755242).

The spelling of 121513440121 in words is "one hundred twenty-one billion, five hundred thirteen million, four hundred forty thousand, one hundred twenty-one".