121201221000001 has 4 divisors (see below), whose sum is σ = 127580232631600. Its totient is φ = 114822209368404.

The previous prime is 121201220999993. The next prime is 121201221000007. The reversal of 121201221000001 is 100000122102121.

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 121201221000001 - 2³ = 121201220999993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121201221000007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3189505815771 + ... + 3189505815808.

It is an arithmetic number, because the mean of its divisors is an integer number (31895058157900).

Almost surely, 2^{121201221000001} is an apocalyptic number.

It is an amenable number.

121201221000001 is a deficient number, since it is larger than the sum of its proper divisors (6379011631599).

121201221000001 is an equidigital number, since it uses as much as digits as its factorization.

121201221000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6379011631598.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121201221000001 its reverse (100000122102121), we get a palindrome (221201343102122).

The spelling of 121201221000001 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twenty-one million, one", and thus it is an aban number.