121200110000111 has 4 divisors (see below), whose sum is σ = 121349924722800. Its totient is φ = 121050295277424.

The previous prime is 121200110000063. The next prime is 121200110000131. The reversal of 121200110000111 is 111000011002121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121200110000111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121200110000092 and 121200110000101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200110000131) 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, 74907360131 + ... + 74907361748.

It is an arithmetic number, because the mean of its divisors is an integer number (30337481180700).

Almost surely, 2^{121200110000111} is an apocalyptic number.

121200110000111 is a deficient number, since it is larger than the sum of its proper divisors (149814722689).

121200110000111 is an equidigital number, since it uses as much as digits as its factorization.

121200110000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149814722688.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121200110000111 its reverse (111000011002121), we get a palindrome (232200121002232).

The spelling of 121200110000111 in words is "one hundred twenty-one trillion, two hundred billion, one hundred ten million, one hundred eleven", and thus it is an aban number.