134321221 has 2 divisors, whose sum is σ = 134321222. Its totient is φ = 134321220.

The previous prime is 134321197. The next prime is 134321249. The reversal of 134321221 is 122123431.

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., 87890625 + 46430596 = 9375^2 + 6814^2 .

It is a cyclic number.

It is not a de Polignac number, because 134321221 - 2⁵ = 134321189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134321281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67160610 + 67160611.

It is an arithmetic number, because the mean of its divisors is an integer number (67160611).

Almost surely, 2^134321221 is an apocalyptic number.

It is an amenable number.

134321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

134321221 is an equidigital number, since it uses as much as digits as its factorization.

134321221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 19.

The square root of 134321221 is about 11589.7032317484. The cubic root of 134321221 is about 512.1315643448.

Adding to 134321221 its reverse (122123431), we get a palindrome (256444652).

It can be divided in two parts, 13 and 4321221, that added together give a palindrome (4321234).

The spelling of 134321221 in words is "one hundred thirty-four million, three hundred twenty-one thousand, two hundred twenty-one".