1217212212 has 12 divisors (see below), whose sum is σ = 2840161856. Its totient is φ = 405737400.

The previous prime is 1217212177. The next prime is 1217212229. The reversal of 1217212212 is 2122127121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50717164 + ... + 50717187.

Almost surely, 2^1217212212 is an apocalyptic number.

1217212212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1217212212 is an abundant number, since it is smaller than the sum of its proper divisors (1622949644).

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

1217212212 is a wasteful number, since it uses less digits than its factorization.

1217212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101434358 (or 101434356 counting only the distinct ones).

The product of its digits is 224, while the sum is 21.

The square root of 1217212212 is about 34888.5685002982. The cubic root of 1217212212 is about 1067.7152202596.

Adding to 1217212212 its reverse (2122127121), we get a palindrome (3339339333).

The spelling of 1217212212 in words is "one billion, two hundred seventeen million, two hundred twelve thousand, two hundred twelve".