1122222121312 has 192 divisors, whose sum is σ = 2428102656000. Its totient is φ = 508912588800.

The previous prime is 1122222121309. The next prime is 1122222121313. The reversal of 1122222121312 is 2131212222211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122222121313) 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, 273777439 + ... + 273781537.

It is an arithmetic number, because the mean of its divisors is an integer number (12646368000).

Almost surely, 2^{1122222121312} 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 1122222121312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1214051328000).

1122222121312 is an abundant number, since it is smaller than the sum of its proper divisors (1305880534688).

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

1122222121312 is a wasteful number, since it uses less digits than its factorization.

1122222121312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4389 (or 4381 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

Adding to 1122222121312 its reverse (2131212222211), we get a palindrome (3253434343523).

The spelling of 1122222121312 in words is "one trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-one thousand, three hundred twelve".