121221011110 has 16 divisors (see below), whose sum is σ = 218207682000. Its totient is φ = 48486212896.

The previous prime is 121221011063. The next prime is 121221011129. The reversal of 121221011110 is 11110122121.

It is a happy number.

121221011110 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31405 + ... + 493384.

It is an arithmetic number, because the mean of its divisors is an integer number (13637980125).

Almost surely, 2^121221011110 is an apocalyptic number.

121221011110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221011110 is a deficient number, since it is larger than the sum of its proper divisors (96986670890).

121221011110 is a wasteful number, since it uses less digits than its factorization.

121221011110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547895.

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

Adding to 121221011110 its reverse (11110122121), we get a palindrome (132331133231).

The spelling of 121221011110 in words is "one hundred twenty-one billion, two hundred twenty-one million, eleven thousand, one hundred ten".