1211130312 has 32 divisors (see below), whose sum is σ = 3460372800. Its totient is φ = 346037184.

The previous prime is 1211130253. The next prime is 1211130313. The reversal of 1211130312 is 2130311121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1211130291 and 1211130300.

It is not an unprimeable number, because it can be changed into a prime (1211130313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3604387 + ... + 3604722.

It is an arithmetic number, because the mean of its divisors is an integer number (108136650).

Almost surely, 2^1211130312 is an apocalyptic number.

1211130312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211130312 is an abundant number, since it is smaller than the sum of its proper divisors (2249242488).

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

1211130312 is a wasteful number, since it uses less digits than its factorization.

1211130312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7209125 (or 7209121 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1211130312 is about 34801.2975620163. The cubic root of 1211130312 is about 1065.9339414893.

Adding to 1211130312 its reverse (2130311121), we get a palindrome (3341441433).

The spelling of 1211130312 in words is "one billion, two hundred eleven million, one hundred thirty thousand, three hundred twelve".