135140105421 has 24 divisors (see below), whose sum is σ = 196121714880. Its totient is φ = 89670079296.

The previous prime is 135140105417. The next prime is 135140105423. The reversal of 135140105421 is 124501041531.

135140105421 is a `hidden beast` number, since 1 + 3 + 514 + 0 + 105 + 42 + 1 = 666.

It is not a de Polignac number, because 135140105421 - 2² = 135140105417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135140105423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1620481 + ... + 1701833.

It is an arithmetic number, because the mean of its divisors is an integer number (8171738120).

Almost surely, 2^135140105421 is an apocalyptic number.

It is an amenable number.

135140105421 is a deficient number, since it is larger than the sum of its proper divisors (60981609459).

135140105421 is a wasteful number, since it uses less digits than its factorization.

135140105421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82225 (or 82222 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 135140105421 its reverse (124501041531), we get a palindrome (259641146952).

The spelling of 135140105421 in words is "one hundred thirty-five billion, one hundred forty million, one hundred five thousand, four hundred twenty-one".