1212223212 has 24 divisors (see below), whose sum is σ = 3142801200. Its totient is φ = 404074368.

The previous prime is 1212223169. The next prime is 1212223213. The reversal of 1212223212 is 2123222121.

1212223212 is a `hidden beast` number, since 121 + 222 + 321 + 2 = 666.

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

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

It is not an unprimeable number, because it can be changed into a prime (1212223213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5612037 + ... + 5612252.

It is an arithmetic number, because the mean of its divisors is an integer number (130950050).

Almost surely, 2^1212223212 is an apocalyptic number.

1212223212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212223212 is an abundant number, since it is smaller than the sum of its proper divisors (1930577988).

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

1212223212 is a wasteful number, since it uses less digits than its factorization.

1212223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11224302 (or 11224294 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 1212223212 is about 34816.9960220580. The cubic root of 1212223212 is about 1066.2544709861.

Adding to 1212223212 its reverse (2123222121), we get a palindrome (3335445333).

The spelling of 1212223212 in words is "one billion, two hundred twelve million, two hundred twenty-three thousand, two hundred twelve".