1131013212 has 48 divisors (see below), whose sum is σ = 3043729920. Its totient is φ = 320179392.

The previous prime is 1131013189. The next prime is 1131013223. The reversal of 1131013212 is 2123101311.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1131013191 and 1131013200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52608 + ... + 70919.

It is an arithmetic number, because the mean of its divisors is an integer number (63411040).

Almost surely, 2^1131013212 is an apocalyptic number.

1131013212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1131013212 is an abundant number, since it is smaller than the sum of its proper divisors (1912716708).

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

1131013212 is a wasteful number, since it uses less digits than its factorization.

1131013212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123650 (or 123648 counting only the distinct ones).

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

The square root of 1131013212 is about 33630.5398707782. The cubic root of 1131013212 is about 1041.8916545726.

Adding to 1131013212 its reverse (2123101311), we get a palindrome (3254114523).

The spelling of 1131013212 in words is "one billion, one hundred thirty-one million, thirteen thousand, two hundred twelve".