111001120002 has 24 divisors (see below), whose sum is σ = 240576395436. Its totient is φ = 36988993536.

The previous prime is 111001119989. The next prime is 111001120003. The reversal of 111001120002 is 200021100111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 76568977521 + 34432142481 = 276711^2 + 185559^2 .

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

It is not an unprimeable number, because it can be changed into a prime (111001120003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 888063 + ... + 1005314.

Almost surely, 2^111001120002 is an apocalyptic number.

111001120002 is an abundant number, since it is smaller than the sum of its proper divisors (129575275434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111001120002 is a wasteful number, since it uses less digits than its factorization.

111001120002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896642 (or 1896639 counting only the distinct ones).

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

Adding to 111001120002 its reverse (200021100111), we get a palindrome (311022220113).

The spelling of 111001120002 in words is "one hundred eleven billion, one million, one hundred twenty thousand, two".