121100111110 has 16 divisors (see below), whose sum is σ = 237796582032. Its totient is φ = 44036404000.

The previous prime is 121100111081. The next prime is 121100111113. The reversal of 121100111110 is 11111001121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100111113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550454941 + ... + 550455160.

It is an arithmetic number, because the mean of its divisors is an integer number (14862286377).

Almost surely, 2^121100111110 is an apocalyptic number.

121100111110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121100111110 is a deficient number, since it is larger than the sum of its proper divisors (116696470922).

121100111110 is a wasteful number, since it uses less digits than its factorization.

121100111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100910119.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 121100111110 its reverse (11111001121), we get a palindrome (132211112231).

It can be divided in two parts, 1211001111 and 10, that added together give a palindrome (1211001121).

The spelling of 121100111110 in words is "one hundred twenty-one billion, one hundred million, one hundred eleven thousand, one hundred ten".