1171201212 has 72 divisors (see below), whose sum is σ = 3033139200. Its totient is φ = 380926368.

The previous prime is 1171201181. The next prime is 1171201231. The reversal of 1171201212 is 2121021711.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 293253 + ... + 297219.

Almost surely, 2^1171201212 is an apocalyptic number.

1171201212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1171201212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1516569600).

1171201212 is an abundant number, since it is smaller than the sum of its proper divisors (1861937988).

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

1171201212 is a wasteful number, since it uses less digits than its factorization.

1171201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175 (or 4170 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 18.

The square root of 1171201212 is about 34222.8171254209. The cubic root of 1171201212 is about 1054.0887325125.

Adding to 1171201212 its reverse (2121021711), we get a palindrome (3292222923).

The spelling of 1171201212 in words is "one billion, one hundred seventy-one million, two hundred one thousand, two hundred twelve".