1330100021 has 2 divisors, whose sum is σ = 1330100022. Its totient is φ = 1330100020.

The previous prime is 1330100017. The next prime is 1330100033. The reversal of 1330100021 is 1200010331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1055535121 + 274564900 = 32489^2 + 16570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330100021 - 2² = 1330100017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1330099975 and 1330100011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1330100041) 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 as a sum of consecutive naturals, namely, 665050010 + 665050011.

It is an arithmetic number, because the mean of its divisors is an integer number (665050011).

Almost surely, 2^1330100021 is an apocalyptic number.

It is an amenable number.

1330100021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330100021 is an equidigital number, since it uses as much as digits as its factorization.

1330100021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1330100021 is about 36470.5363409972. The cubic root of 1330100021 is about 1099.7520159995.

Adding to 1330100021 its reverse (1200010331), we get a palindrome (2530110352).

The spelling of 1330100021 in words is "one billion, three hundred thirty million, one hundred thousand, twenty-one".