111002010021 has 48 divisors (see below), whose sum is σ = 183819976704. Its totient is φ = 63229807872.

The previous prime is 111002010011. The next prime is 111002010029. The reversal of 111002010021 is 120010200111.

It is a happy number.

It is not a de Polignac number, because 111002010021 - 2⁹ = 111002009509 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 111002009985 and 111002010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111002010029) 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 47 ways as a sum of consecutive naturals, for example, 30978396 + ... + 30981978.

It is an arithmetic number, because the mean of its divisors is an integer number (3829582848).

Almost surely, 2^111002010021 is an apocalyptic number.

It is an amenable number.

111002010021 is a deficient number, since it is larger than the sum of its proper divisors (72817966683).

111002010021 is a wasteful number, since it uses less digits than its factorization.

111002010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5010 (or 5007 counting only the distinct ones).

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

Adding to 111002010021 its reverse (120010200111), we get a palindrome (231012210132).

The spelling of 111002010021 in words is "one hundred eleven billion, two million, ten thousand, twenty-one".