1211312023312 has 20 divisors (see below), whose sum is σ = 2448956917440. Its totient is φ = 579323141408.

The previous prime is 1211312023301. The next prime is 1211312023343. The reversal of 1211312023312 is 2133202131121.

It is a super-2 number, since 2×1211312023312² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1645804012 + ... + 1645804747.

It is an arithmetic number, because the mean of its divisors is an integer number (122447845872).

Almost surely, 2^{1211312023312} is an apocalyptic number.

It is an amenable number.

1211312023312 is an abundant number, since it is smaller than the sum of its proper divisors (1237644894128).

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

1211312023312 is a wasteful number, since it uses less digits than its factorization.

1211312023312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3291608790 (or 3291608784 counting only the distinct ones).

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

Adding to 1211312023312 its reverse (2133202131121), we get a palindrome (3344514154433).

The spelling of 1211312023312 in words is "one trillion, two hundred eleven billion, three hundred twelve million, twenty-three thousand, three hundred twelve".