121110122111 has 4 divisors (see below), whose sum is σ = 132120133224. Its totient is φ = 110100111000.

The previous prime is 121110122101. The next prime is 121110122131. The reversal of 121110122111 is 111221011121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111221011121 = 11 ⋅10111001011.

It is not a de Polignac number, because 121110122111 - 2¹⁸ = 121109859967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110122101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5505005540 + ... + 5505005561.

It is an arithmetic number, because the mean of its divisors is an integer number (33030033306).

Almost surely, 2^121110122111 is an apocalyptic number.

121110122111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121110122111 is a deficient number, since it is larger than the sum of its proper divisors (11010011113).

121110122111 is a wasteful number, since it uses less digits than its factorization.

121110122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11010011112.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121110122111 its reverse (111221011121), we get a palindrome (232331133232).

The spelling of 121110122111 in words is "one hundred twenty-one billion, one hundred ten million, one hundred twenty-two thousand, one hundred eleven".