121121110220211 has 64 divisors (see below), whose sum is σ = 181299775733760. Its totient is φ = 79913169423360.

The previous prime is 121121110220189. The next prime is 121121110220239. The reversal of 121121110220211 is 112022011121121.

It is a happy number.

121121110220211 is a `hidden beast` number, since 1 + 2 + 1 + 121 + 110 + 220 + 211 = 666.

It is not a de Polignac number, because 121121110220211 - 2³⁰ = 121120036478387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121121110220261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6692874315 + ... + 6692892411.

It is an arithmetic number, because the mean of its divisors is an integer number (2832808995840).

Almost surely, 2^{121121110220211} is an apocalyptic number.

121121110220211 is a deficient number, since it is larger than the sum of its proper divisors (60178665513549).

121121110220211 is a wasteful number, since it uses less digits than its factorization.

121121110220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22961 (or 22955 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121121110220211 its reverse (112022011121121), we get a palindrome (233143121341332).

The spelling of 121121110220211 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred ten million, two hundred twenty thousand, two hundred eleven".