121112010100111 has 4 divisors (see below), whose sum is σ = 121112355106224. Its totient is φ = 121111665094000.

The previous prime is 121112010100093. The next prime is 121112010100117. The reversal of 121112010100111 is 111001010211121.

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 121112010100111 - 2²¹ = 121112008002959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121112010100091 and 121112010100100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112010100117) 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, 171975955 + ... + 172678756.

It is an arithmetic number, because the mean of its divisors is an integer number (30278088776556).

Almost surely, 2^{121112010100111} is an apocalyptic number.

121112010100111 is a deficient number, since it is larger than the sum of its proper divisors (345006113).

121112010100111 is an equidigital number, since it uses as much as digits as its factorization.

121112010100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345006112.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 121112010100111 its reverse (111001010211121), we get a palindrome (232113020311232).

It can be divided in two parts, 121112010 and 100111, that added together give a palindrome (121212121).

The spelling of 121112010100111 in words is "one hundred twenty-one trillion, one hundred twelve billion, ten million, one hundred thousand, one hundred eleven".