1221132212 has 6 divisors (see below), whose sum is σ = 2136981378. Its totient is φ = 610566104.

The previous prime is 1221132193. The next prime is 1221132251. The reversal of 1221132212 is 2122311221.

It can be written as a sum of positive squares in only one way, i.e., 871666576 + 349465636 = 29524^2 + 18694^2 .

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 as a sum of consecutive naturals, namely, 152641523 + ... + 152641530.

It is an arithmetic number, because the mean of its divisors is an integer number (356163563).

Almost surely, 2^1221132212 is an apocalyptic number.

It is an amenable number.

1221132212 is a deficient number, since it is larger than the sum of its proper divisors (915849166).

1221132212 is a wasteful number, since it uses less digits than its factorization.

1221132212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305283057 (or 305283055 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 1221132212 is about 34944.7022021937. The cubic root of 1221132212 is about 1068.8601749921.

Adding to 1221132212 its reverse (2122311221), we get a palindrome (3343443433).

The spelling of 1221132212 in words is "one billion, two hundred twenty-one million, one hundred thirty-two thousand, two hundred twelve".