1002022102021 has 4 divisors (see below), whose sum is σ = 1029103780492. Its totient is φ = 974940423552.

The previous prime is 1002022102009. The next prime is 1002022102079. The reversal of 1002022102021 is 1202012202001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 620808471396 + 381213630625 = 787914^2 + 617425^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002022102021 - 2¹⁵ = 1002022069253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002022101992 and 1002022102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002022102001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13540839180 + ... + 13540839253.

It is an arithmetic number, because the mean of its divisors is an integer number (257275945123).

Almost surely, 2^{1002022102021} is an apocalyptic number.

It is an amenable number.

1002022102021 is a deficient number, since it is larger than the sum of its proper divisors (27081678471).

1002022102021 is an equidigital number, since it uses as much as digits as its factorization.

1002022102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27081678470.

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

Adding to 1002022102021 its reverse (1202012202001), we get a palindrome (2204034304022).

The spelling of 1002022102021 in words is "one trillion, two billion, twenty-two million, one hundred two thousand, twenty-one".