121202020202121 has 24 divisors (see below), whose sum is σ = 181450747437960. Its totient is φ = 77896264882176.

The previous prime is 121202020202119. The next prime is 121202020202161.

It is a happy number.

121202020202121 is a `hidden beast` number, since 121 + 20 + 202 + 0 + 202 + 121 = 666.

121202020202121 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 87206835171600 + 33995185030521 = 9338460^2 + 5830539^2 .

It is not a de Polignac number, because 121202020202121 - 2¹ = 121202020202119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121202020202094 and 121202020202103.

It is not an unprimeable number, because it can be changed into a prime (121202020202161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1669551000 + ... + 1669623593.

It is an arithmetic number, because the mean of its divisors is an integer number (7560447809915).

Almost surely, 2^{121202020202121} is an apocalyptic number.

It is an amenable number.

121202020202121 is a deficient number, since it is larger than the sum of its proper divisors (60248727235839).

121202020202121 is a wasteful number, since it uses less digits than its factorization.

121202020202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339174745 (or 3339174742 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The spelling of 121202020202121 in words is "one hundred twenty-one trillion, two hundred two billion, twenty million, two hundred two thousand, one hundred twenty-one".