121201111212201 has 48 divisors (see below), whose sum is σ = 181231269373440. Its totient is φ = 78002907897600.

The previous prime is 121201111212127. The next prime is 121201111212221. The reversal of 121201111212201 is 102212111102121.

It is a happy number.

121201111212201 is a `hidden beast` number, since 1 + 212 + 0 + 111 + 121 + 220 + 1 = 666.

It is not a de Polignac number, because 121201111212201 - 2¹³ = 121201111204009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121201111212221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19515720 + ... + 24965286.

It is an arithmetic number, because the mean of its divisors is an integer number (3775651445280).

Almost surely, 2^{121201111212201} is an apocalyptic number.

It is an amenable number.

121201111212201 is a deficient number, since it is larger than the sum of its proper divisors (60030158161239).

121201111212201 is a wasteful number, since it uses less digits than its factorization.

121201111212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5450286 (or 5450283 counting only the distinct ones).

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

Adding to 121201111212201 its reverse (102212111102121), we get a palindrome (223413222314322).

The spelling of 121201111212201 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred eleven million, two hundred twelve thousand, two hundred one".