121002020202121 has 64 divisors (see below), whose sum is σ = 131901459840000. Its totient is φ = 110651125358592.

The previous prime is 121002020202101. The next prime is 121002020202181. The reversal of 121002020202121 is 121202020200121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121002020202121 - 2³⁵ = 120967660463753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121002020202095 and 121002020202104.

It is not an unprimeable number, because it can be changed into a prime (121002020202101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10643148525 + ... + 10643159893.

It is an arithmetic number, because the mean of its divisors is an integer number (2060960310000).

Almost surely, 2^{121002020202121} is an apocalyptic number.

It is an amenable number.

121002020202121 is a deficient number, since it is larger than the sum of its proper divisors (10899439637879).

121002020202121 is a wasteful number, since it uses less digits than its factorization.

121002020202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12386.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121002020202121 its reverse (121202020200121), we get a palindrome (242204040402242).

The spelling of 121002020202121 in words is "one hundred twenty-one trillion, two billion, twenty million, two hundred two thousand, one hundred twenty-one".