12211212122 has 16 divisors (see below), whose sum is σ = 18846257472. Its totient is φ = 5930438880.

The previous prime is 12211212119. The next prime is 12211212127. The reversal of 12211212122 is 22121211221.

It is a super-2 number, since 2×12211212122² (a number of 21 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12211212122.

It is not an unprimeable number, because it can be changed into a prime (12211212127) 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, 309398 + ... + 346625.

It is an arithmetic number, because the mean of its divisors is an integer number (1177891092).

Almost surely, 2^12211212122 is an apocalyptic number.

12211212122 is a deficient number, since it is larger than the sum of its proper divisors (6635045350).

12211212122 is a wasteful number, since it uses less digits than its factorization.

12211212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656293.

The product of its digits is 64, while the sum is 17.

Adding to 12211212122 its reverse (22121211221), we get a palindrome (34332423343).

Subtracting 12211212122 from its reverse (22121211221), we obtain a palindrome (9909999099).

The spelling of 12211212122 in words is "twelve billion, two hundred eleven million, two hundred twelve thousand, one hundred twenty-two".