121120102111 has 4 divisors (see below), whose sum is σ = 121120798824. Its totient is φ = 121119405400.

The previous prime is 121120102091. The next prime is 121120102141. The reversal of 121120102111 is 111201021121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121120102111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121120102091 and 121120102100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120102141) 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, 151341 + ... + 514921.

It is an arithmetic number, because the mean of its divisors is an integer number (30280199706).

Almost surely, 2^121120102111 is an apocalyptic number.

121120102111 is a deficient number, since it is larger than the sum of its proper divisors (696713).

121120102111 is an equidigital number, since it uses as much as digits as its factorization.

121120102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696712.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121120102111 its reverse (111201021121), we get a palindrome (232321123232).

It can be divided in two parts, 1 and 21120102111, that added together give a palindrome (21120102112).

The spelling of 121120102111 in words is "one hundred twenty-one billion, one hundred twenty million, one hundred two thousand, one hundred eleven".