121206525602121 has 12 divisors (see below), whose sum is σ = 175149376825540. Its totient is φ = 80770526883360.

The previous prime is 121206525602011. The next prime is 121206525602167.

121206525602121 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 0 + 6 + 5 + 25 + 602 + 1 + 21 = 666.

121206525602121 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 78391279593225 + 42815246008896 = 8853885^2 + 6543336^2 .

It is not a de Polignac number, because 121206525602121 - 2¹⁰ = 121206525601097 is a prime.

It is a super-2 number, since 2×121206525602121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121206525602191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2818603810 + ... + 2818646811.

Almost surely, 2^{121206525602121} is an apocalyptic number.

It is an amenable number.

121206525602121 is a deficient number, since it is larger than the sum of its proper divisors (53942851223419).

121206525602121 is a wasteful number, since it uses less digits than its factorization.

121206525602121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5637253016 (or 5637253013 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 121206525602121 in words is "one hundred twenty-one trillion, two hundred six billion, five hundred twenty-five million, six hundred two thousand, one hundred twenty-one".