1002112021 has 4 divisors (see below), whose sum is σ = 1009321600. Its totient is φ = 994902444.

The previous prime is 1002112019. The next prime is 1002112043. The reversal of 1002112021 is 1202112001.

1002112021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1202112001 = 22741 ⋅52861.

It is a cyclic number.

It is not a de Polignac number, because 1002112021 - 2¹ = 1002112019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002111989 and 1002112007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002112091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3604581 + ... + 3604858.

It is an arithmetic number, because the mean of its divisors is an integer number (252330400).

Almost surely, 2^1002112021 is an apocalyptic number.

It is an amenable number.

1002112021 is a deficient number, since it is larger than the sum of its proper divisors (7209579).

1002112021 is an equidigital number, since it uses as much as digits as its factorization.

1002112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7209578.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1002112021 is about 31656.1529722106. The cubic root of 1002112021 is about 1000.7035119549.

Adding to 1002112021 its reverse (1202112001), we get a palindrome (2204224022).

The spelling of 1002112021 in words is "one billion, two million, one hundred twelve thousand, twenty-one".