1222212312 has 48 divisors (see below), whose sum is σ = 3342952080. Its totient is φ = 403368000.

The previous prime is 1222212281. The next prime is 1222212359. The reversal of 1222212312 is 2132122221.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76764 + ... + 91307.

It is an arithmetic number, because the mean of its divisors is an integer number (69644835).

Almost surely, 2^1222212312 is an apocalyptic number.

1222212312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1222212312 is an abundant number, since it is smaller than the sum of its proper divisors (2120739768).

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

1222212312 is a wasteful number, since it uses less digits than its factorization.

1222212312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168184 (or 168177 counting only the distinct ones).

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

The square root of 1222212312 is about 34960.1532033256. The cubic root of 1222212312 is about 1069.1752202292.

Adding to 1222212312 its reverse (2132122221), we get a palindrome (3354334533).

Subtracting 1222212312 from its reverse (2132122221), we obtain a palindrome (909909909).

The spelling of 1222212312 in words is "one billion, two hundred twenty-two million, two hundred twelve thousand, three hundred twelve".