134211521 has 2 divisors, whose sum is σ = 134211522. Its totient is φ = 134211520.

The previous prime is 134211499. The next prime is 134211523. The reversal of 134211521 is 125112431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76755121 + 57456400 = 8761^2 + 7580^2 .

It is a cyclic number.

It is not a de Polignac number, because 134211521 - 2¹⁸ = 133949377 is a prime.

Together with 134211523, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 134211493 and 134211502.

It is not a weakly prime, because it can be changed into another prime (134211523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67105760 + 67105761.

It is an arithmetic number, because the mean of its divisors is an integer number (67105761).

Almost surely, 2^134211521 is an apocalyptic number.

It is an amenable number.

134211521 is a deficient number, since it is larger than the sum of its proper divisors (1).

134211521 is an equidigital number, since it uses as much as digits as its factorization.

134211521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 20.

The square root of 134211521 is about 11584.9696158428. The cubic root of 134211521 is about 511.9921072697.

Adding to 134211521 its reverse (125112431), we get a palindrome (259323952).

The spelling of 134211521 in words is "one hundred thirty-four million, two hundred eleven thousand, five hundred twenty-one".