121112021110 has 16 divisors (see below), whose sum is σ = 225518936400. Its totient is φ = 46774297696.

The previous prime is 121112021071. The next prime is 121112021137. The reversal of 121112021110 is 11120211121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208813540 + ... + 208814119.

It is an arithmetic number, because the mean of its divisors is an integer number (14094933525).

Almost surely, 2^121112021110 is an apocalyptic number.

121112021110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121112021110 is a deficient number, since it is larger than the sum of its proper divisors (104406915290).

121112021110 is a wasteful number, since it uses less digits than its factorization.

121112021110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417627695.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121112021110 its reverse (11120211121), we get a palindrome (132232232231).

The spelling of 121112021110 in words is "one hundred twenty-one billion, one hundred twelve million, twenty-one thousand, one hundred ten".