121121220211112 has 32 divisors (see below), whose sum is σ = 251445681047520. Its totient is φ = 54233382181440.

The previous prime is 121121220211039. The next prime is 121121220211127. The reversal of 121121220211112 is 211112022121121.

It is a happy number.

It is an unprimeable number.

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, 10271468003 + ... + 10271479794.

It is an arithmetic number, because the mean of its divisors is an integer number (7857677532735).

Almost surely, 2^{121121220211112} is an apocalyptic number.

It is an amenable number.

121121220211112 is an abundant number, since it is smaller than the sum of its proper divisors (130324460836408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121121220211112 is a wasteful number, since it uses less digits than its factorization.

121121220211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20542947881 (or 20542947877 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 121121220211112 its reverse (211112022121121), we get a palindrome (332233242332233).

The spelling of 121121220211112 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty million, two hundred eleven thousand, one hundred twelve".