121212012109 has 8 divisors (see below), whose sum is σ = 126654671232. Its totient is φ = 115783734000.

The previous prime is 121212012073. The next prime is 121212012157. The reversal of 121212012109 is 901210212121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121212012109 - 2⁷ = 121212011981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121212012109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212012199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3578017 + ... + 3611734.

It is an arithmetic number, because the mean of its divisors is an integer number (15831833904).

Almost surely, 2^121212012109 is an apocalyptic number.

It is an amenable number.

121212012109 is a deficient number, since it is larger than the sum of its proper divisors (5442659123).

121212012109 is an equidigital number, since it uses as much as digits as its factorization.

121212012109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7190507.

The product of its (nonzero) digits is 144, while the sum is 22.

It can be divided in two parts, 121212012 and 109, that added together give a palindrome (121212121).

The spelling of 121212012109 in words is "one hundred twenty-one billion, two hundred twelve million, twelve thousand, one hundred nine".