121111320110 has 64 divisors (see below), whose sum is σ = 248293154304. Its totient is φ = 42102825600.

The previous prime is 121111320107. The next prime is 121111320119. The reversal of 121111320110 is 11023111121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111320119) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 5040425 + ... + 5064395.

It is an arithmetic number, because the mean of its divisors is an integer number (3879580536).

Almost surely, 2^121111320110 is an apocalyptic number.

121111320110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111320110 is an abundant number, since it is smaller than the sum of its proper divisors (127181834194).

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

121111320110 is a wasteful number, since it uses less digits than its factorization.

121111320110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26009.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 121111320110 its reverse (11023111121), we get a palindrome (132134431231).

The spelling of 121111320110 in words is "one hundred twenty-one billion, one hundred eleven million, three hundred twenty thousand, one hundred ten".