121112120012111 has 4 divisors (see below), whose sum is σ = 121121451415800. Its totient is φ = 121102788608424.

The previous prime is 121112120012057. The next prime is 121112120012129. The reversal of 121112120012111 is 111210021211121.

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 121112120012111 - 2¹⁸ = 121112119749967 is a prime.

It is a super-2 number, since 2×121112120012111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121112120012111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112120012311) 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, 4665682376 + ... + 4665708333.

It is an arithmetic number, because the mean of its divisors is an integer number (30280362853950).

Almost surely, 2^{121112120012111} is an apocalyptic number.

121112120012111 is a deficient number, since it is larger than the sum of its proper divisors (9331403689).

121112120012111 is an equidigital number, since it uses as much as digits as its factorization.

121112120012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9331403688.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121112120012111 its reverse (111210021211121), we get a palindrome (232322141223232).

The spelling of 121112120012111 in words is "one hundred twenty-one trillion, one hundred twelve billion, one hundred twenty million, twelve thousand, one hundred eleven".