121202121022121 has 16 divisors (see below), whose sum is σ = 129590401720320. Its totient is φ = 112957148828160.

The previous prime is 121202121022039. The next prime is 121202121022123. The reversal of 121202121022121 is 121220121202121.

It is a cyclic number.

It is not a de Polignac number, because 121202121022121 - 2³⁰ = 121201047280297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121202121022093 and 121202121022102.

It is not an unprimeable number, because it can be changed into a prime (121202121022123) 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, 52750481 + ... + 55000158.

It is an arithmetic number, because the mean of its divisors is an integer number (8099400107520).

Almost surely, 2^{121202121022121} is an apocalyptic number.

It is an amenable number.

121202121022121 is a deficient number, since it is larger than the sum of its proper divisors (8388280698199).

121202121022121 is a wasteful number, since it uses less digits than its factorization.

121202121022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107751304.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121202121022121 its reverse (121220121202121), we get a palindrome (242422242224242).

The spelling of 121202121022121 in words is "one hundred twenty-one trillion, two hundred two billion, one hundred twenty-one million, twenty-two thousand, one hundred twenty-one".