121000515507 has 6 divisors (see below), whose sum is σ = 174778522412. Its totient is φ = 80667010332.

The previous prime is 121000515499. The next prime is 121000515539. The reversal of 121000515507 is 705515000121.

121000515507 is a `hidden beast` number, since 1 + 2 + 100 + 0 + 5 + 1 + 550 + 7 = 666.

It is not a de Polignac number, because 121000515507 - 2³ = 121000515499 is a prime.

It is a super-2 number, since 2×121000515507² (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 (121000515107) 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 5 ways as a sum of consecutive naturals, for example, 6722250853 + ... + 6722250870.

Almost surely, 2^121000515507 is an apocalyptic number.

121000515507 is a deficient number, since it is larger than the sum of its proper divisors (53778006905).

121000515507 is a wasteful number, since it uses less digits than its factorization.

121000515507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13444501729 (or 13444501726 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 27.

Adding to 121000515507 its reverse (705515000121), we get a palindrome (826515515628).

The spelling of 121000515507 in words is "one hundred twenty-one billion, five hundred fifteen thousand, five hundred seven".