121021202120121 has 96 divisors (see below), whose sum is σ = 186440810130432. Its totient is φ = 75485707038720.

The previous prime is 121021202120089. The next prime is 121021202120123.

121021202120121 is a `hidden beast` number, since 1 + 210 + 2 + 120 + 212 + 0 + 121 = 666.

121021202120121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 121021202120121 - 2⁵ = 121021202120089 is a prime.

It is a super-2 number, since 2×121021202120121² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121021202120094 and 121021202120103.

It is not an unprimeable number, because it can be changed into a prime (121021202120123) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2138495536 + ... + 2138552126.

It is an arithmetic number, because the mean of its divisors is an integer number (1942091772192).

Almost surely, 2^{121021202120121} is an apocalyptic number.

It is an amenable number.

121021202120121 is a deficient number, since it is larger than the sum of its proper divisors (65419608010311).

121021202120121 is a wasteful number, since it uses less digits than its factorization.

121021202120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57863 (or 57860 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

It can be divided in two parts, 12102120 and 2120121, that added together give a palindrome (14222241).

The spelling of 121021202120121 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred two million, one hundred twenty thousand, one hundred twenty-one".