120002100111 has 24 divisors (see below), whose sum is σ = 178048685360. Its totient is φ = 77827153536.

The previous prime is 120002100109. The next prime is 120002100181. The reversal of 120002100111 is 111001200021.

It is a happy number.

It is not a de Polignac number, because 120002100111 - 2¹ = 120002100109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120002100093 and 120002100102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120002100181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2459691 + ... + 2508003.

Almost surely, 2^120002100111 is an apocalyptic number.

120002100111 is a deficient number, since it is larger than the sum of its proper divisors (58046585249).

120002100111 is a wasteful number, since it uses less digits than its factorization.

120002100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55815 (or 55812 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 120002100111 its reverse (111001200021), we get a palindrome (231003300132).

The spelling of 120002100111 in words is "one hundred twenty billion, two million, one hundred thousand, one hundred eleven".