1212135111 has 40 divisors (see below), whose sum is σ = 2023571088. Its totient is φ = 716688000.

The previous prime is 1212135083. The next prime is 1212135151. The reversal of 1212135111 is 1115312121.

It is not a de Polignac number, because 1212135111 - 2⁵ = 1212135079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212135151) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19941 + ... + 53121.

Almost surely, 2^1212135111 is an apocalyptic number.

1212135111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212135111 is a deficient number, since it is larger than the sum of its proper divisors (811435977).

1212135111 is a wasteful number, since it uses less digits than its factorization.

1212135111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33245 (or 33236 counting only the distinct ones).

The product of its digits is 60, while the sum is 18.

The square root of 1212135111 is about 34815.7307980172. The cubic root of 1212135111 is about 1066.2286395605.

Adding to 1212135111 its reverse (1115312121), we get a palindrome (2327447232).

The spelling of 1212135111 in words is "one billion, two hundred twelve million, one hundred thirty-five thousand, one hundred eleven".