135044322221 has 2 divisors, whose sum is σ = 135044322222. Its totient is φ = 135044322220.

The previous prime is 135044322211. The next prime is 135044322251. The reversal of 135044322221 is 122223440531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133217700100 + 1826622121 = 364990^2 + 42739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135044322221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135044322211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67522161110 + 67522161111.

It is an arithmetic number, because the mean of its divisors is an integer number (67522161111).

Almost surely, 2^135044322221 is an apocalyptic number.

It is an amenable number.

135044322221 is a deficient number, since it is larger than the sum of its proper divisors (1).

135044322221 is an equidigital number, since it uses as much as digits as its factorization.

135044322221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 135044322221 its reverse (122223440531), we get a palindrome (257267762752).

The spelling of 135044322221 in words is "one hundred thirty-five billion, forty-four million, three hundred twenty-two thousand, two hundred twenty-one".