1321023133 has 2 divisors, whose sum is σ = 1321023134. Its totient is φ = 1321023132.

The previous prime is 1321023107. The next prime is 1321023161. The reversal of 1321023133 is 3313201231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 966152889 + 354870244 = 31083^2 + 18838^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321023133 - 2²⁹ = 784152221 is a prime.

It is a super-2 number, since 2×1321023133² = 3490204235842271378, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1321023133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321023163) 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, 660511566 + 660511567.

It is an arithmetic number, because the mean of its divisors is an integer number (660511567).

Almost surely, 2^1321023133 is an apocalyptic number.

It is an amenable number.

1321023133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321023133 is an equidigital number, since it uses as much as digits as its factorization.

1321023133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1321023133 is about 36345.8819262926. The cubic root of 1321023133 is about 1097.2446558063.

Adding to 1321023133 its reverse (3313201231), we get a palindrome (4634224364).

The spelling of 1321023133 in words is "one billion, three hundred twenty-one million, twenty-three thousand, one hundred thirty-three".