1002322021 has 2 divisors, whose sum is σ = 1002322022. Its totient is φ = 1002322020.

The previous prime is 1002322019. The next prime is 1002322043. The reversal of 1002322021 is 1202232001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 511212100 + 491109921 = 22610^2 + 22161^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002322021 - 2¹ = 1002322019 is a prime.

Together with 1002322019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1002321992 and 1002322010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002322051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501161010 + 501161011.

It is an arithmetic number, because the mean of its divisors is an integer number (501161011).

Almost surely, 2^1002322021 is an apocalyptic number.

It is an amenable number.

1002322021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002322021 is an equidigital number, since it uses as much as digits as its factorization.

1002322021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1002322021 is about 31659.4696891783. The cubic root of 1002322021 is about 1000.7734086848.

Adding to 1002322021 its reverse (1202232001), we get a palindrome (2204554022).

The spelling of 1002322021 in words is "one billion, two million, three hundred twenty-two thousand, twenty-one".