135131421453320 has 128 divisors (see below), whose sum is σ = 310268100240000. Its totient is φ = 52952962332672.

The previous prime is 135131421453269. The next prime is 135131421453359. The reversal of 135131421453320 is 23354124131531.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 962274071 + ... + 962414489.

It is an arithmetic number, because the mean of its divisors is an integer number (2423969533125).

Almost surely, 2^{135131421453320} is an apocalyptic number.

135131421453320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135131421453320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155134050120000).

135131421453320 is an abundant number, since it is smaller than the sum of its proper divisors (175136678786680).

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

135131421453320 is a wasteful number, since it uses less digits than its factorization.

135131421453320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141895 (or 141891 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 135131421453320 its reverse (23354124131531), we get a palindrome (158485545584851).

The spelling of 135131421453320 in words is "one hundred thirty-five trillion, one hundred thirty-one billion, four hundred twenty-one million, four hundred fifty-three thousand, three hundred twenty".