1131223211212 has 48 divisors (see below), whose sum is σ = 2214613548000. Its totient is φ = 502447463424.

The previous prime is 1131223211207. The next prime is 1131223211219. The reversal of 1131223211212 is 2121123221311.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1131223211219) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1279887 + ... + 1974982.

It is an arithmetic number, because the mean of its divisors is an integer number (46137782250).

Almost surely, 2^{1131223211212} is an apocalyptic number.

It is an amenable number.

1131223211212 is a deficient number, since it is larger than the sum of its proper divisors (1083390336788).

1131223211212 is a wasteful number, since it uses less digits than its factorization.

1131223211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3255178 (or 3255176 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

Adding to 1131223211212 its reverse (2121123221311), we get a palindrome (3252346432523).

The spelling of 1131223211212 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-three million, two hundred eleven thousand, two hundred twelve".