121121201100201 has 4 divisors (see below), whose sum is σ = 161494934800272. Its totient is φ = 80747467400132.

The previous prime is 121121201100139. The next prime is 121121201100299. The reversal of 121121201100201 is 102001102121121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121121201100201 - 2¹⁰ = 121121201099177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121121201100401) 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 3 ways as a sum of consecutive naturals, for example, 20186866850031 + ... + 20186866850036.

It is an arithmetic number, because the mean of its divisors is an integer number (40373733700068).

Almost surely, 2^{121121201100201} is an apocalyptic number.

It is an amenable number.

121121201100201 is a deficient number, since it is larger than the sum of its proper divisors (40373733700071).

121121201100201 is an equidigital number, since it uses as much as digits as its factorization.

121121201100201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40373733700070.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121121201100201 its reverse (102001102121121), we get a palindrome (223122303221322).

The spelling of 121121201100201 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred one million, one hundred thousand, two hundred one".