134431044421 has 4 divisors (see below), whose sum is σ = 134443087372. Its totient is φ = 134419001472.

The previous prime is 134431044409. The next prime is 134431044463. The reversal of 134431044421 is 124440134431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124440134431 = 349093 ⋅356467.

It can be written as a sum of positive squares in 2 ways, for example, as 68887876225 + 65543168196 = 262465^2 + 256014^2 .

It is a cyclic number.

It is not a de Polignac number, because 134431044421 - 2²⁷ = 134296826693 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 (134431044491) 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, 6004716 + ... + 6027061.

It is an arithmetic number, because the mean of its divisors is an integer number (33610771843).

Almost surely, 2^134431044421 is an apocalyptic number.

It is an amenable number.

134431044421 is a deficient number, since it is larger than the sum of its proper divisors (12042951).

134431044421 is a wasteful number, since it uses less digits than its factorization.

134431044421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12042950.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 134431044421 its reverse (124440134431), we get a palindrome (258871178852).

The spelling of 134431044421 in words is "one hundred thirty-four billion, four hundred thirty-one million, forty-four thousand, four hundred twenty-one".