133155435121 has 2 divisors, whose sum is σ = 133155435122. Its totient is φ = 133155435120.

The previous prime is 133155435109. The next prime is 133155435137. The reversal of 133155435121 is 121534551331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133122819600 + 32615521 = 364860^2 + 5711^2 .

It is a cyclic number.

It is not a de Polignac number, because 133155435121 - 2¹⁵ = 133155402353 is a prime.

It is not a weakly prime, because it can be changed into another prime (133155435151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66577717560 + 66577717561.

It is an arithmetic number, because the mean of its divisors is an integer number (66577717561).

Almost surely, 2^133155435121 is an apocalyptic number.

It is an amenable number.

133155435121 is a deficient number, since it is larger than the sum of its proper divisors (1).

133155435121 is an equidigital number, since it uses as much as digits as its factorization.

133155435121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 34.

Adding to 133155435121 its reverse (121534551331), we get a palindrome (254689986452).

The spelling of 133155435121 in words is "one hundred thirty-three billion, one hundred fifty-five million, four hundred thirty-five thousand, one hundred twenty-one".