121111021212201 has 48 divisors (see below), whose sum is σ = 180146847054720. Its totient is φ = 78348427027200.

The previous prime is 121111021212163. The next prime is 121111021212221. The reversal of 121111021212201 is 102212120111121.

It is a happy number.

121111021212201 is a `hidden beast` number, since 1 + 211 + 110 + 2 + 121 + 220 + 1 = 666.

It is not a de Polignac number, because 121111021212201 - 2²⁷ = 121110886994473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121111021212221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 606112956 + ... + 606312738.

It is an arithmetic number, because the mean of its divisors is an integer number (3753059313640).

Almost surely, 2^{121111021212201} is an apocalyptic number.

It is an amenable number.

121111021212201 is a deficient number, since it is larger than the sum of its proper divisors (59035825842519).

121111021212201 is a wasteful number, since it uses less digits than its factorization.

121111021212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204686 (or 204683 counting only the distinct ones).

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

Adding to 121111021212201 its reverse (102212120111121), we get a palindrome (223323141323322).

The spelling of 121111021212201 in words is "one hundred twenty-one trillion, one hundred eleven billion, twenty-one million, two hundred twelve thousand, two hundred one".