135221912 has 32 divisors (see below), whose sum is σ = 292432800. Its totient is φ = 57417984.

The previous prime is 135221897. The next prime is 135221941. The reversal of 135221912 is 219122531.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4973 + ... + 17180.

It is an arithmetic number, because the mean of its divisors is an integer number (9138525).

Almost surely, 2^135221912 is an apocalyptic number.

It is an amenable number.

135221912 is an abundant number, since it is smaller than the sum of its proper divisors (157210888).

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

135221912 is a wasteful number, since it uses less digits than its factorization.

135221912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22275 (or 22271 counting only the distinct ones).

The product of its digits is 1080, while the sum is 26.

The square root of 135221912 is about 11628.4956894690. The cubic root of 135221912 is about 513.2737147081.

The spelling of 135221912 in words is "one hundred thirty-five million, two hundred twenty-one thousand, nine hundred twelve".