121212101022101 has 6 divisors (see below), whose sum is σ = 126711326777910. Its totient is φ = 115942009672808.

The previous prime is 121212101022097. The next prime is 121212101022107. The reversal of 121212101022101 is 101220101212121.

It can be written as a sum of positive squares in only one way, i.e., 73190180875876 + 48021920146225 = 8555126^2 + 6929785^2 .

It is not a de Polignac number, because 121212101022101 - 2² = 121212101022097 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 121212101022101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212101022107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114567202706 + ... + 114567203763.

It is an arithmetic number, because the mean of its divisors is an integer number (21118554462985).

Almost surely, 2^{121212101022101} is an apocalyptic number.

It is an amenable number.

121212101022101 is a deficient number, since it is larger than the sum of its proper divisors (5499225755809).

121212101022101 is an equidigital number, since it uses as much as digits as its factorization.

121212101022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229134406515 (or 229134406492 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121212101022101 its reverse (101220101212121), we get a palindrome (222432202234222).

The spelling of 121212101022101 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred one million, twenty-two thousand, one hundred one".