1002020221021 has 4 divisors (see below), whose sum is σ = 1004907887712. Its totient is φ = 999132554332.

The previous prime is 1002020221009. The next prime is 1002020221117. The reversal of 1002020221021 is 1201220202001.

It is a happy number.

1002020221021 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002020221021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002020220992 and 1002020221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002020224021) 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, 1443832825 + ... + 1443833518.

It is an arithmetic number, because the mean of its divisors is an integer number (251226971928).

Almost surely, 2^{1002020221021} is an apocalyptic number.

It is an amenable number.

1002020221021 is a deficient number, since it is larger than the sum of its proper divisors (2887666691).

1002020221021 is an equidigital number, since it uses as much as digits as its factorization.

1002020221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887666690.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1002020221021 its reverse (1201220202001), we get a palindrome (2203240423022).

The spelling of 1002020221021 in words is "one trillion, two billion, twenty million, two hundred twenty-one thousand, twenty-one".