1002010021021 has 4 divisors (see below), whose sum is σ = 1002952646752. Its totient is φ = 1001067395292.

The previous prime is 1002010020971. The next prime is 1002010021073. The reversal of 1002010021021 is 1201200102001.

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 1002010021021 - 2²⁷ = 1001875803293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002010020989 and 1002010021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002010021091) 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, 471311271 + ... + 471313396.

It is an arithmetic number, because the mean of its divisors is an integer number (250738161688).

Almost surely, 2^{1002010021021} is an apocalyptic number.

It is an amenable number.

1002010021021 is a deficient number, since it is larger than the sum of its proper divisors (942625731).

1002010021021 is an equidigital number, since it uses as much as digits as its factorization.

1002010021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942625730.

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

Adding to 1002010021021 its reverse (1201200102001), we get a palindrome (2203210123022).

The spelling of 1002010021021 in words is "one trillion, two billion, ten million, twenty-one thousand, twenty-one".