1131213220312 has 96 divisors (see below), whose sum is σ = 2613616722720. Its totient is φ = 456084034560.

The previous prime is 1131213220307. The next prime is 1131213220343. The reversal of 1131213220312 is 2130223121311.

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, 15363778 + ... + 15437230.

It is an arithmetic number, because the mean of its divisors is an integer number (27225174195).

Almost surely, 2^{1131213220312} 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 1131213220312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1306808361360).

1131213220312 is an abundant number, since it is smaller than the sum of its proper divisors (1482403502408).

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

1131213220312 is a wasteful number, since it uses less digits than its factorization.

1131213220312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75801 (or 75790 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1131213220312 its reverse (2130223121311), we get a palindrome (3261436341623).

Subtracting 1131213220312 from its reverse (2130223121311), we obtain a palindrome (999009900999).

The spelling of 1131213220312 in words is "one trillion, one hundred thirty-one billion, two hundred thirteen million, two hundred twenty thousand, three hundred twelve".