1323202010021 has 2 divisors, whose sum is σ = 1323202010022. Its totient is φ = 1323202010020.

The previous prime is 1323202010003. The next prime is 1323202010063. The reversal of 1323202010021 is 1200102023231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 995744536900 + 327457473121 = 997870^2 + 572239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323202010021 - 2³⁸ = 1048324103077 is a prime.

It is a super-2 number, since 2×1323202010021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323202016021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661601005010 + 661601005011.

It is an arithmetic number, because the mean of its divisors is an integer number (661601005011).

Almost surely, 2^{1323202010021} is an apocalyptic number.

It is an amenable number.

1323202010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323202010021 is an equidigital number, since it uses as much as digits as its factorization.

1323202010021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1323202010021 its reverse (1200102023231), we get a palindrome (2523304033252).

The spelling of 1323202010021 in words is "one trillion, three hundred twenty-three billion, two hundred two million, ten thousand, twenty-one".