1212231222 has 48 divisors (see below), whose sum is σ = 2707637712. Its totient is φ = 391677120.

The previous prime is 1212231203. The next prime is 1212231227. The reversal of 1212231222 is 2221322121.

1212231222 is a `hidden beast` number, since 1 + 212 + 231 + 222 = 666.

It is a super-2 number, since 2×1212231222² = 2939009071183226568, which contains 22 as substring.

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 a junction number, because it is equal to n+sod(n) for n = 1212231195 and 1212231204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212231227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 181197 + ... + 187767.

It is an arithmetic number, because the mean of its divisors is an integer number (56409119).

Almost surely, 2^1212231222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212231222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1353818856).

1212231222 is an abundant number, since it is smaller than the sum of its proper divisors (1495406490).

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

1212231222 is a wasteful number, since it uses less digits than its factorization.

1212231222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6893 (or 6890 counting only the distinct ones).

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

The square root of 1212231222 is about 34817.1110518952. Note that the first 3 decimals coincide. The cubic root of 1212231222 is about 1066.2568194753.

Adding to 1212231222 its reverse (2221322121), we get a palindrome (3433553343).

The spelling of 1212231222 in words is "one billion, two hundred twelve million, two hundred thirty-one thousand, two hundred twenty-two".