133121321321 has 2 divisors, whose sum is σ = 133121321322. Its totient is φ = 133121321320.

The previous prime is 133121321309. The next prime is 133121321413. The reversal of 133121321321 is 123123121331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109362490000 + 23758831321 = 330700^2 + 154139^2 .

It is a cyclic number.

It is not a de Polignac number, because 133121321321 - 2⁶ = 133121321257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (133121371321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66560660660 + 66560660661.

It is an arithmetic number, because the mean of its divisors is an integer number (66560660661).

Almost surely, 2^133121321321 is an apocalyptic number.

It is an amenable number.

133121321321 is a deficient number, since it is larger than the sum of its proper divisors (1).

133121321321 is an equidigital number, since it uses as much as digits as its factorization.

133121321321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

Adding to 133121321321 its reverse (123123121331), we get a palindrome (256244442652).

The spelling of 133121321321 in words is "one hundred thirty-three billion, one hundred twenty-one million, three hundred twenty-one thousand, three hundred twenty-one".