121220121111201 has 24 divisors (see below), whose sum is σ = 200110089990720. Its totient is φ = 69268403965536.

The previous prime is 121220121111157. The next prime is 121220121111227. The reversal of 121220121111201 is 102111121022121.

It is a happy number.

121220121111201 is a `hidden beast` number, since 1 + 21 + 220 + 1 + 211 + 11 + 201 = 666.

It is not a de Polignac number, because 121220121111201 - 2⁹ = 121220121110689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121220121111251) 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, 16208631 + ... + 22475763.

It is an arithmetic number, because the mean of its divisors is an integer number (8337920416280).

Almost surely, 2^{121220121111201} is an apocalyptic number.

It is an amenable number.

121220121111201 is a deficient number, since it is larger than the sum of its proper divisors (78889968879519).

121220121111201 is a wasteful number, since it uses less digits than its factorization.

121220121111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6574165 (or 6574162 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121220121111201 its reverse (102111121022121), we get a palindrome (223331242133322).

The spelling of 121220121111201 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-one million, one hundred eleven thousand, two hundred one".