12135211 has 6 divisors (see below), whose sum is σ = 13338836. Its totient is φ = 11031900.

The previous prime is 12135203. The next prime is 12135217. The reversal of 12135211 is 11253121.

12135211 = T₃₈₆ + T₃₈₇ + ... + T₅₀₆.

It is not a de Polignac number, because 12135211 - 2³ = 12135203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12135217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50025 + ... + 50266.

Almost surely, 2^12135211 is an apocalyptic number.

12135211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12135211 is a deficient number, since it is larger than the sum of its proper divisors (1203625).

12135211 is a wasteful number, since it uses less digits than its factorization.

12135211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100313 (or 100302 counting only the distinct ones).

The product of its digits is 60, while the sum is 16.

The square root of 12135211 is about 3483.5629748865. The cubic root of 12135211 is about 229.7995165372.

Adding to 12135211 its reverse (11253121), we get a palindrome (23388332).

The spelling of 12135211 in words is "twelve million, one hundred thirty-five thousand, two hundred eleven".