12212212122 has 48 divisors (see below), whose sum is σ = 28872586080. Its totient is φ = 3699727200.

The previous prime is 12212212031. The next prime is 12212212211. The reversal of 12212212122 is 22121221221.

It is a happy number.

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 = 12212212095 and 12212212104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1489029 + ... + 1497207.

It is an arithmetic number, because the mean of its divisors is an integer number (601512210).

Almost surely, 2^12212212122 is an apocalyptic number.

12212212122 is an abundant number, since it is smaller than the sum of its proper divisors (16660373958).

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

12212212122 is a wasteful number, since it uses less digits than its factorization.

12212212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15739 (or 15736 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

Adding to 12212212122 its reverse (22121221221), we get a palindrome (34333433343).

Subtracting 12212212122 from its reverse (22121221221), we obtain a palindrome (9909009099).

The spelling of 12212212122 in words is "twelve billion, two hundred twelve million, two hundred twelve thousand, one hundred twenty-two".