135211111 has 8 divisors (see below), whose sum is σ = 156644384. Its totient is φ = 114307200.

The previous prime is 135211103. The next prime is 135211123. The reversal of 135211111 is 111112531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135211111 - 2³ = 135211103 is a prime.

It is a Duffinian number.

135211111 is a modest number, since divided by 11111 gives 1352 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135211171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131790 + ... + 132811.

It is an arithmetic number, because the mean of its divisors is an integer number (19580548).

Almost surely, 2^135211111 is an apocalyptic number.

135211111 is a deficient number, since it is larger than the sum of its proper divisors (21433273).

135211111 is an equidigital number, since it uses as much as digits as its factorization.

135211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264681.

The product of its digits is 30, while the sum is 16.

The square root of 135211111 is about 11628.0312607079. The cubic root of 135211111 is about 513.2600482420.

Adding to 135211111 its reverse (111112531), we get a palindrome (246323642).

The spelling of 135211111 in words is "one hundred thirty-five million, two hundred eleven thousand, one hundred eleven".