134123201221 has 2 divisors, whose sum is σ = 134123201222. Its totient is φ = 134123201220.

The previous prime is 134123201203. The next prime is 134123201243. The reversal of 134123201221 is 122102321431.

It is an a-pointer prime, because the next prime (134123201243) can be obtained adding 134123201221 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92120748196 + 42002453025 = 303514^2 + 204945^2 .

It is a cyclic number.

It is not a de Polignac number, because 134123201221 - 2⁹ = 134123200709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 134123201192 and 134123201201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134123201291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67061600610 + 67061600611.

It is an arithmetic number, because the mean of its divisors is an integer number (67061600611).

Almost surely, 2^134123201221 is an apocalyptic number.

It is an amenable number.

134123201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

134123201221 is an equidigital number, since it uses as much as digits as its factorization.

134123201221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 134123201221 its reverse (122102321431), we get a palindrome (256225522652).

The spelling of 134123201221 in words is "one hundred thirty-four billion, one hundred twenty-three million, two hundred one thousand, two hundred twenty-one".