135721103124 has 24 divisors (see below), whose sum is σ = 317694348160. Its totient is φ = 45095828544.

The previous prime is 135721103123. The next prime is 135721103153. The reversal of 135721103124 is 421301127531.

It is a junction number, because it is equal to n+sod(n) for n = 135721103091 and 135721103100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135721103123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18063484 + ... + 18070995.

Almost surely, 2^135721103124 is an apocalyptic number.

It is an amenable number.

135721103124 is an abundant number, since it is smaller than the sum of its proper divisors (181973245036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135721103124 is a wasteful number, since it uses less digits than its factorization.

135721103124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36134799 (or 36134797 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 135721103124 in words is "one hundred thirty-five billion, seven hundred twenty-one million, one hundred three thousand, one hundred twenty-four".