111002000121 has 24 divisors (see below), whose sum is σ = 161210729160. Its totient is φ = 73597925376.

The previous prime is 111002000093. The next prime is 111002000141. The reversal of 111002000121 is 121000200111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21334692096 + 89667308025 = 146064^2 + 299445^2 .

It is not a de Polignac number, because 111002000121 - 2⁷ = 111001999993 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111002000141) 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, 9215715 + ... + 9227751.

It is an arithmetic number, because the mean of its divisors is an integer number (6717113715).

Almost surely, 2^111002000121 is an apocalyptic number.

It is an amenable number.

111002000121 is a deficient number, since it is larger than the sum of its proper divisors (50208729039).

111002000121 is a wasteful number, since it uses less digits than its factorization.

111002000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17545 (or 17542 counting only the distinct ones).

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

Adding to 111002000121 its reverse (121000200111), we get a palindrome (232002200232).

The spelling of 111002000121 in words is "one hundred eleven billion, two million, one hundred twenty-one", and thus it is an aban number.