434134240021 has 4 divisors (see below), whose sum is σ = 434350984032. Its totient is φ = 433917496012.

The previous prime is 434134240019. The next prime is 434134240027. The reversal of 434134240021 is 120042431434.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120042431434 = 2 ⋅60021215717.

It is a cyclic number.

It is not a de Polignac number, because 434134240021 - 2¹ = 434134240019 is a prime.

It is a super-3 number, since 3×434134240021³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434134240027) 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, 108369001 + ... + 108373006.

It is an arithmetic number, because the mean of its divisors is an integer number (108587746008).

Almost surely, 2^434134240021 is an apocalyptic number.

It is an amenable number.

434134240021 is a deficient number, since it is larger than the sum of its proper divisors (216744011).

434134240021 is a wasteful number, since it uses less digits than its factorization.

434134240021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216744010.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 434134240021 its reverse (120042431434), we get a palindrome (554176671455).

The spelling of 434134240021 in words is "four hundred thirty-four billion, one hundred thirty-four million, two hundred forty thousand, twenty-one".