121111012210111 has 32 divisors (see below), whose sum is σ = 154884841689600. Its totient is φ = 91952140654080.

The previous prime is 121111012210109. The next prime is 121111012210163. The reversal of 121111012210111 is 111012210111121.

It is not a de Polignac number, because 121111012210111 - 2¹ = 121111012210109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111012210211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43362646 + ... + 46071043.

It is an arithmetic number, because the mean of its divisors is an integer number (4840151302800).

Almost surely, 2^{121111012210111} is an apocalyptic number.

121111012210111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121111012210111 is a deficient number, since it is larger than the sum of its proper divisors (33773829479489).

121111012210111 is a wasteful number, since it uses less digits than its factorization.

121111012210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89434159.

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

Adding to 121111012210111 its reverse (111012210111121), we get a palindrome (232123222321232).

It can be divided in two parts, 121 and 111012210111, that multiplied together give a palindrome (13432477423431).

The spelling of 121111012210111 in words is "one hundred twenty-one trillion, one hundred eleven billion, twelve million, two hundred ten thousand, one hundred eleven".