134021430421 has 4 divisors (see below), whose sum is σ = 134056217932. Its totient is φ = 133986642912.

The previous prime is 134021430391. The next prime is 134021430449. The reversal of 134021430421 is 124034120431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124034120431 = 13 ⋅9541086187.

It can be written as a sum of positive squares in 2 ways, for example, as 103112274321 + 30909156100 = 321111^2 + 175810^2 .

It is a cyclic number.

It is not a de Polignac number, because 134021430421 - 2³³ = 125431495829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134021437421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17387976 + ... + 17395681.

It is an arithmetic number, because the mean of its divisors is an integer number (33514054483).

Almost surely, 2^134021430421 is an apocalyptic number.

It is an amenable number.

134021430421 is a deficient number, since it is larger than the sum of its proper divisors (34787511).

134021430421 is an equidigital number, since it uses as much as digits as its factorization.

134021430421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34787510.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 134021430421 its reverse (124034120431), we get a palindrome (258055550852).

The spelling of 134021430421 in words is "one hundred thirty-four billion, twenty-one million, four hundred thirty thousand, four hundred twenty-one".