121201020000109 has 4 divisors (see below), whose sum is σ = 138515451428704. Its totient is φ = 103886588571516.

The previous prime is 121201020000091. The next prime is 121201020000133. The reversal of 121201020000109 is 901000020102121.

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 121201020000109 - 2²³ = 121201011611501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201020000149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8657215714287 + ... + 8657215714300.

It is an arithmetic number, because the mean of its divisors is an integer number (34628862857176).

Almost surely, 2^{121201020000109} is an apocalyptic number.

It is an amenable number.

121201020000109 is a deficient number, since it is larger than the sum of its proper divisors (17314431428595).

121201020000109 is an equidigital number, since it uses as much as digits as its factorization.

121201020000109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17314431428594.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 121201020000109 in words is "one hundred twenty-one trillion, two hundred one billion, twenty million, one hundred nine", and thus it is an aban number.