111002002101 has 16 divisors (see below), whose sum is σ = 164452552320. Its totient is φ = 73999020960.

The previous prime is 111002002081. The next prime is 111002002159. The reversal of 111002002101 is 101200200111.

It is a happy number.

It is not a de Polignac number, because 111002002101 - 2²² = 110997807797 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111002002201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1581136 + ... + 1649846.

It is an arithmetic number, because the mean of its divisors is an integer number (10278284520).

Almost surely, 2^111002002101 is an apocalyptic number.

It is an amenable number.

111002002101 is a deficient number, since it is larger than the sum of its proper divisors (53450550219).

111002002101 is an equidigital number, since it uses as much as digits as its factorization.

111002002101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128553 (or 128547 counting only the distinct ones).

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

Adding to 111002002101 its reverse (101200200111), we get a palindrome (212202202212).

The spelling of 111002002101 in words is "one hundred eleven billion, two million, two thousand, one hundred one".