135221431324 has 24 divisors (see below), whose sum is σ = 271419206240. Its totient is φ = 57742825536.

The previous prime is 135221431309. The next prime is 135221431337. The reversal of 135221431324 is 423134122531.

It is a super-2 number, since 2×135221431324² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 8709459 + ... + 8724970.

Almost surely, 2^135221431324 is an apocalyptic number.

135221431324 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

135221431324 is an abundant number, since it is smaller than the sum of its proper divisors (136197774916).

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

135221431324 is a wasteful number, since it uses less digits than its factorization.

135221431324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17434717 (or 17434715 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

Adding to 135221431324 its reverse (423134122531), we get a palindrome (558355553855).

The spelling of 135221431324 in words is "one hundred thirty-five billion, two hundred twenty-one million, four hundred thirty-one thousand, three hundred twenty-four".