121010122111111 has 4 divisors (see below), whose sum is σ = 122541895808800. Its totient is φ = 119478348413424.

The previous prime is 121010122110967. The next prime is 121010122111127. The reversal of 121010122111111 is 111111221010121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121010122111111 - 2¹⁷ = 121010121980039 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 (121010122111141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765886848726 + ... + 765886848883.

It is an arithmetic number, because the mean of its divisors is an integer number (30635473952200).

Almost surely, 2^{121010122111111} is an apocalyptic number.

121010122111111 is a deficient number, since it is larger than the sum of its proper divisors (1531773697689).

121010122111111 is an equidigital number, since it uses as much as digits as its factorization.

121010122111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531773697688.

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

Adding to 121010122111111 its reverse (111111221010121), we get a palindrome (232121343121232).

The spelling of 121010122111111 in words is "one hundred twenty-one trillion, ten billion, one hundred twenty-two million, one hundred eleven thousand, one hundred eleven".