135440132421 has 32 divisors (see below), whose sum is σ = 208791668736. Its totient is φ = 77182560000.

The previous prime is 135440132411. The next prime is 135440132479. The reversal of 135440132421 is 124231044531.

It is not a de Polignac number, because 135440132421 - 2⁹ = 135440131909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135440132411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 474756 + ... + 704466.

It is an arithmetic number, because the mean of its divisors is an integer number (6524739648).

Almost surely, 2^135440132421 is an apocalyptic number.

135440132421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

135440132421 is a deficient number, since it is larger than the sum of its proper divisors (73351536315).

135440132421 is a wasteful number, since it uses less digits than its factorization.

135440132421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230793.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 135440132421 its reverse (124231044531), we get a palindrome (259671176952).

The spelling of 135440132421 in words is "one hundred thirty-five billion, four hundred forty million, one hundred thirty-two thousand, four hundred twenty-one".