121220102001111 has 16 divisors (see below), whose sum is σ = 166002733756800. Its totient is φ = 78625636819488.

The previous prime is 121220102001109. The next prime is 121220102001181. The reversal of 121220102001111 is 111100201022121.

It is a happy number.

It is not a de Polignac number, because 121220102001111 - 2¹ = 121220102001109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220102001181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22704801 + ... + 27530858.

It is an arithmetic number, because the mean of its divisors is an integer number (10375170859800).

Almost surely, 2^{121220102001111} is an apocalyptic number.

121220102001111 is a deficient number, since it is larger than the sum of its proper divisors (44782631755689).

121220102001111 is a wasteful number, since it uses less digits than its factorization.

121220102001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50257438.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121220102001111 its reverse (111100201022121), we get a palindrome (232320303023232).

The spelling of 121220102001111 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred two million, one thousand, one hundred eleven".