134413231021 has 2 divisors, whose sum is σ = 134413231022. Its totient is φ = 134413231020.

The previous prime is 134413230989. The next prime is 134413231027. The reversal of 134413231021 is 120132314431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121808678121 + 12604552900 = 349011^2 + 112270^2 .

It is a cyclic number.

It is not a de Polignac number, because 134413231021 - 2⁵ = 134413230989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134413231027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67206615510 + 67206615511.

It is an arithmetic number, because the mean of its divisors is an integer number (67206615511).

Almost surely, 2^134413231021 is an apocalyptic number.

It is an amenable number.

134413231021 is a deficient number, since it is larger than the sum of its proper divisors (1).

134413231021 is an equidigital number, since it uses as much as digits as its factorization.

134413231021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 134413231021 its reverse (120132314431), we get a palindrome (254545545452).

The spelling of 134413231021 in words is "one hundred thirty-four billion, four hundred thirteen million, two hundred thirty-one thousand, twenty-one".