133420688221 has 2 divisors, whose sum is σ = 133420688222. Its totient is φ = 133420688220.

The previous prime is 133420688197. The next prime is 133420688227. The reversal of 133420688221 is 122886024331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106749225625 + 26671462596 = 326725^2 + 163314^2 .

It is a cyclic number.

It is not a de Polignac number, because 133420688221 - 2⁹ = 133420687709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133420688227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66710344110 + 66710344111.

It is an arithmetic number, because the mean of its divisors is an integer number (66710344111).

Almost surely, 2^133420688221 is an apocalyptic number.

It is an amenable number.

133420688221 is a deficient number, since it is larger than the sum of its proper divisors (1).

133420688221 is an equidigital number, since it uses as much as digits as its factorization.

133420688221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 133420688221 in words is "one hundred thirty-three billion, four hundred twenty million, six hundred eighty-eight thousand, two hundred twenty-one".