1211123312 has 40 divisors (see below), whose sum is σ = 2683459200. Its totient is φ = 518726592.

The previous prime is 1211123269. The next prime is 1211123323. The reversal of 1211123312 is 2133211121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282239 + ... + 286497.

It is an arithmetic number, because the mean of its divisors is an integer number (67086480).

Almost surely, 2^1211123312 is an apocalyptic number.

It is an amenable number.

1211123312 is an abundant number, since it is smaller than the sum of its proper divisors (1472335888).

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

1211123312 is a wasteful number, since it uses less digits than its factorization.

1211123312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6813 (or 6807 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 1211123312 is about 34801.1969909082. The cubic root of 1211123312 is about 1065.9318878837.

Adding to 1211123312 its reverse (2133211121), we get a palindrome (3344334433).

The spelling of 1211123312 in words is "one billion, two hundred eleven million, one hundred twenty-three thousand, three hundred twelve".