1123213312312 has 128 divisors (see below), whose sum is σ = 2726861760000. Its totient is φ = 421753683456.

The previous prime is 1123213312279. The next prime is 1123213312339. The reversal of 1123213312312 is 2132133123211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 794739 + ... + 1696477.

It is an arithmetic number, because the mean of its divisors is an integer number (21303607500).

Almost surely, 2^{1123213312312} 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 1123213312312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1363430880000).

1123213312312 is an abundant number, since it is smaller than the sum of its proper divisors (1603648447688).

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

1123213312312 is a wasteful number, since it uses less digits than its factorization.

1123213312312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901853 (or 901849 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

Adding to 1123213312312 its reverse (2132133123211), we get a palindrome (3255346435523).

The spelling of 1123213312312 in words is "one trillion, one hundred twenty-three billion, two hundred thirteen million, three hundred twelve thousand, three hundred twelve".