121504562121 has 16 divisors (see below), whose sum is σ = 164358976320. Its totient is φ = 79831368960.

The previous prime is 121504562089. The next prime is 121504562159. The reversal of 121504562121 is 121265405121.

It is not a de Polignac number, because 121504562121 - 2⁵ = 121504562089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121504562521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494700 + ... + 698381.

It is an arithmetic number, because the mean of its divisors is an integer number (10272436020).

Almost surely, 2^121504562121 is an apocalyptic number.

It is an amenable number.

121504562121 is a deficient number, since it is larger than the sum of its proper divisors (42854414199).

121504562121 is a wasteful number, since it uses less digits than its factorization.

121504562121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193576.

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 121504562121 its reverse (121265405121), we get a palindrome (242769967242).

The spelling of 121504562121 in words is "one hundred twenty-one billion, five hundred four million, five hundred sixty-two thousand, one hundred twenty-one".