122122212221212 has 96 divisors (see below), whose sum is σ = 257508041369600. Its totient is φ = 49504679497728.

The previous prime is 122122212221203. The next prime is 122122212221213. The reversal of 122122212221212 is 212122212221221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122212221213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1578236668 + ... + 1578314044.

Almost surely, 2^{122122212221212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122122212221212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128754020684800).

122122212221212 is an abundant number, since it is smaller than the sum of its proper divisors (135385829148388).

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

122122212221212 is a wasteful number, since it uses less digits than its factorization.

122122212221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82083 (or 82081 counting only the distinct ones).

The product of its digits is 1024, while the sum is 25.

Adding to 122122212221212 its reverse (212122212221221), we get a palindrome (334244424442433).

Subtracting 122122212221212 from its reverse (212122212221221), we obtain a palindrome (90000000000009).

The spelling of 122122212221212 in words is "one hundred twenty-two trillion, one hundred twenty-two billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twelve".