102212135 has 4 divisors (see below), whose sum is σ = 122654568. Its totient is φ = 81769704.

The previous prime is 102212129. The next prime is 102212137. The reversal of 102212135 is 531212201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102212135 - 2⁴ = 102212119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102212137) 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 3 ways as a sum of consecutive naturals, for example, 10221209 + ... + 10221218.

It is an arithmetic number, because the mean of its divisors is an integer number (30663642).

Almost surely, 2^102212135 is an apocalyptic number.

102212135 is a deficient number, since it is larger than the sum of its proper divisors (20442433).

102212135 is an equidigital number, since it uses as much as digits as its factorization.

102212135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20442432.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 102212135 is about 10110.0017309593. The cubic root of 102212135 is about 467.5565584961.

Adding to 102212135 its reverse (531212201), we get a palindrome (633424336).

The spelling of 102212135 in words is "one hundred two million, two hundred twelve thousand, one hundred thirty-five".