1321020133033 has 4 divisors (see below), whose sum is σ = 1398727199700. Its totient is φ = 1243313066368.

The previous prime is 1321020133009. The next prime is 1321020133039. The reversal of 1321020133033 is 3303310201231.

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 1039916576169 + 281103556864 = 1019763^2 + 530192^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321020133033 - 2²¹ = 1321018035881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321020132995 and 1321020133013.

It is not an unprimeable number, because it can be changed into a prime (1321020133039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38853533308 + ... + 38853533341.

It is an arithmetic number, because the mean of its divisors is an integer number (349681799925).

Almost surely, 2^{1321020133033} is an apocalyptic number.

It is an amenable number.

1321020133033 is a deficient number, since it is larger than the sum of its proper divisors (77707066667).

1321020133033 is an equidigital number, since it uses as much as digits as its factorization.

1321020133033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77707066666.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 1321020133033 its reverse (3303310201231), we get a palindrome (4624330334264).

The spelling of 1321020133033 in words is "one trillion, three hundred twenty-one billion, twenty million, one hundred thirty-three thousand, thirty-three".