121202002220121 has 24 divisors (see below), whose sum is σ = 182484768021504. Its totient is φ = 77444119193760.

The previous prime is 121202002220111. The next prime is 121202002220141. The reversal of 121202002220121 is 121022200202121.

It is a happy number.

121202002220121 is a `hidden beast` number, since 1 + 2 + 120 + 200 + 2 + 220 + 121 = 666.

It is not a de Polignac number, because 121202002220121 - 2⁴³ = 112405909197913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121202002220094 and 121202002220103.

It is not an unprimeable number, because it can be changed into a prime (121202002220111) 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, 2716171545 + ... + 2716216166.

It is an arithmetic number, because the mean of its divisors is an integer number (7603532000896).

Almost surely, 2^{121202002220121} is an apocalyptic number.

It is an amenable number.

121202002220121 is a deficient number, since it is larger than the sum of its proper divisors (61282765801383).

121202002220121 is a wasteful number, since it uses less digits than its factorization.

121202002220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5432387821 (or 5432387818 counting only the distinct ones).

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

Adding to 121202002220121 its reverse (121022200202121), we get a palindrome (242224202422242).

The spelling of 121202002220121 in words is "one hundred twenty-one trillion, two hundred two billion, two million, two hundred twenty thousand, one hundred twenty-one".