1222121112212 has 72 divisors (see below), whose sum is σ = 2922835174560. Its totient is φ = 439524066240.

The previous prime is 1222121112209. The next prime is 1222121112301. The reversal of 1222121112212 is 2122111212221.

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 23 ways as a sum of consecutive naturals, for example, 21773762 + ... + 21829817.

It is an arithmetic number, because the mean of its divisors is an integer number (40594932980).

Almost surely, 2^{1222121112212} is an apocalyptic number.

It is an amenable number.

1222121112212 is an abundant number, since it is smaller than the sum of its proper divisors (1700714062348).

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

1222121112212 is a wasteful number, since it uses less digits than its factorization.

1222121112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43603621 (or 43603612 counting only the distinct ones).

The product of its digits is 128, while the sum is 20.

Adding to 1222121112212 its reverse (2122111212221), we get a palindrome (3344232324433).

The spelling of 1222121112212 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twelve".