134042400420221 has 2 divisors, whose sum is σ = 134042400420222. Its totient is φ = 134042400420220.

The previous prime is 134042400420199. The next prime is 134042400420287. The reversal of 134042400420221 is 122024004240431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67988501124196 + 66053899296025 = 8245514^2 + 8127355^2 .

It is a cyclic number.

It is not a de Polignac number, because 134042400420221 - 2⁶ = 134042400420157 is a prime.

It is a super-2 number, since 2×134042400420221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134042400425221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67021200210110 + 67021200210111.

It is an arithmetic number, because the mean of its divisors is an integer number (67021200210111).

Almost surely, 2^{134042400420221} is an apocalyptic number.

It is an amenable number.

134042400420221 is a deficient number, since it is larger than the sum of its proper divisors (1).

134042400420221 is an equidigital number, since it uses as much as digits as its factorization.

134042400420221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 134042400420221 its reverse (122024004240431), we get a palindrome (256066404660652).

The spelling of 134042400420221 in words is "one hundred thirty-four trillion, forty-two billion, four hundred million, four hundred twenty thousand, two hundred twenty-one".