121212012110 has 16 divisors (see below), whose sum is σ = 249350425056. Its totient is φ = 41558404128.

The previous prime is 121212012073. The next prime is 121212012157. The reversal of 121212012110 is 11210212121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865800017 + ... + 865800156.

It is an arithmetic number, because the mean of its divisors is an integer number (15584401566).

Almost surely, 2^121212012110 is an apocalyptic number.

121212012110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121212012110 is an abundant number, since it is smaller than the sum of its proper divisors (128138412946).

121212012110 is a wasteful number, since it uses less digits than its factorization.

121212012110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731600187.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121212012110 its reverse (11210212121), we get a palindrome (132422224231).

The spelling of 121212012110 in words is "one hundred twenty-one billion, two hundred twelve million, twelve thousand, one hundred ten".