135317221440 has 112 divisors (see below), whose sum is σ = 429744225600. Its totient is φ = 36075182080.

The previous prime is 135317221423. The next prime is 135317221441. The reversal of 135317221440 is 44122713531.

It is not an unprimeable number, because it can be changed into a prime (135317221441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4158835 + ... + 4191245.

Almost surely, 2^135317221440 is an apocalyptic number.

135317221440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135317221440 is an abundant number, since it is smaller than the sum of its proper divisors (294427004160).

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

135317221440 is a wasteful number, since it uses less digits than its factorization.

135317221440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36780 (or 36770 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

Adding to 135317221440 its reverse (44122713531), we get a palindrome (179439934971).

The spelling of 135317221440 in words is "one hundred thirty-five billion, three hundred seventeen million, two hundred twenty-one thousand, four hundred forty".