121212101010001 has 8 divisors (see below), whose sum is σ = 124169918745600. Its totient is φ = 118254351132960.

The previous prime is 121212101009983. The next prime is 121212101010017. The reversal of 121212101010001 is 100010101212121.

It is a happy number.

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 121212101010001 - 2¹¹ = 121212101007953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121212101014001) 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 7 ways as a sum of consecutive naturals, for example, 13339221 + ... + 20502658.

It is an arithmetic number, because the mean of its divisors is an integer number (15521239843200).

Almost surely, 2^{121212101010001} is an apocalyptic number.

It is an amenable number.

121212101010001 is a deficient number, since it is larger than the sum of its proper divisors (2957817735599).

121212101010001 is an equidigital number, since it uses as much as digits as its factorization.

121212101010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33929279.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121212101010001 its reverse (100010101212121), we get a palindrome (221222202222122).

The spelling of 121212101010001 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred one million, ten thousand, one".