121120111102111 has 16 divisors (see below), whose sum is σ = 135535910646528. Its totient is φ = 107279020676800.

The previous prime is 121120111102091. The next prime is 121120111102181. The reversal of 121120111102111 is 111201111021121.

It is a cyclic number.

It is not a de Polignac number, because 121120111102111 - 2²¹ = 121120109004959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120111102181) 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 15 ways as a sum of consecutive naturals, for example, 180391021 + ... + 181061206.

It is an arithmetic number, because the mean of its divisors is an integer number (8470994415408).

Almost surely, 2^{121120111102111} is an apocalyptic number.

121120111102111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121120111102111 is a deficient number, since it is larger than the sum of its proper divisors (14415799544417).

121120111102111 is a wasteful number, since it uses less digits than its factorization.

121120111102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361453022.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 121120111102111 its reverse (111201111021121), we get a palindrome (232321222123232).

It can be divided in two parts, 1 and 21120111102111, that added together give a palindrome (21120111102112).

The spelling of 121120111102111 in words is "one hundred twenty-one trillion, one hundred twenty billion, one hundred eleven million, one hundred two thousand, one hundred eleven".