1002112021021 has 4 divisors (see below), whose sum is σ = 1005922333152. Its totient is φ = 998301708892.

The previous prime is 1002112021013. The next prime is 1002112021039. The reversal of 1002112021021 is 1201202112001.

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.

It is a cyclic number.

It is not a de Polignac number, because 1002112021021 - 2³ = 1002112021013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002112020992 and 1002112021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002112021121) 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, 1905155671 + ... + 1905156196.

It is an arithmetic number, because the mean of its divisors is an integer number (251480583288).

Almost surely, 2^{1002112021021} is an apocalyptic number.

It is an amenable number.

1002112021021 is a deficient number, since it is larger than the sum of its proper divisors (3810312131).

1002112021021 is an equidigital number, since it uses as much as digits as its factorization.

1002112021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3810312130.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1002112021021 its reverse (1201202112001), we get a palindrome (2203314133022).

The spelling of 1002112021021 in words is "one trillion, two billion, one hundred twelve million, twenty-one thousand, twenty-one".