2002112021 has 12 divisors (see below), whose sum is σ = 2508141132. Its totient is φ = 1584088128.

The previous prime is 2002112017. The next prime is 2002112051. The reversal of 2002112021 is 1202112002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 232227121 + 1769884900 = 15239^2 + 42070^2 .

It is not a de Polignac number, because 2002112021 - 2² = 2002112017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2002111993 and 2002112011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002112051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1570880 + ... + 1572153.

It is an arithmetic number, because the mean of its divisors is an integer number (209011761).

Almost surely, 2^2002112021 is an apocalyptic number.

It is an amenable number.

2002112021 is a deficient number, since it is larger than the sum of its proper divisors (506029111).

2002112021 is a wasteful number, since it uses less digits than its factorization.

2002112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143060 (or 3143053 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2002112021 is about 44744.9664319910. The cubic root of 2002112021 is about 1260.3643904933.

Adding to 2002112021 its reverse (1202112002), we get a palindrome (3204224023).

The spelling of 2002112021 in words is "two billion, two million, one hundred twelve thousand, twenty-one".