135304321220 has 24 divisors (see below), whose sum is σ = 288954993600. Its totient is φ = 53204410592.

The previous prime is 135304321193. The next prime is 135304321231. The reversal of 135304321220 is 22123403531.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 135304321220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57331160 + ... + 57333519.

It is an arithmetic number, because the mean of its divisors is an integer number (12039791400).

Almost surely, 2^135304321220 is an apocalyptic number.

135304321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135304321220 is an abundant number, since it is smaller than the sum of its proper divisors (153650672380).

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

135304321220 is a wasteful number, since it uses less digits than its factorization.

135304321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114664747 (or 114664745 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 135304321220 its reverse (22123403531), we get a palindrome (157427724751).

The spelling of 135304321220 in words is "one hundred thirty-five billion, three hundred four million, three hundred twenty-one thousand, two hundred twenty".