1221244212 has 24 divisors (see below), whose sum is σ = 2850963136. Its totient is φ = 406882368.

The previous prime is 1221244207. The next prime is 1221244231. The reversal of 1221244212 is 2124421221.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1833 + ... + 49455.

Almost surely, 2^1221244212 is an apocalyptic number.

1221244212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221244212 is an abundant number, since it is smaller than the sum of its proper divisors (1629718924).

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

1221244212 is a wasteful number, since it uses less digits than its factorization.

1221244212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49767 (or 49765 counting only the distinct ones).

The product of its digits is 512, while the sum is 21.

The square root of 1221244212 is about 34946.3046973496. The cubic root of 1221244212 is about 1068.8928519561.

Adding to 1221244212 its reverse (2124421221), we get a palindrome (3345665433).

The spelling of 1221244212 in words is "one billion, two hundred twenty-one million, two hundred forty-four thousand, two hundred twelve".