1131244212 has 96 divisors (see below), whose sum is σ = 3059933184. Its totient is φ = 318614400.

The previous prime is 1131244187. The next prime is 1131244223. The reversal of 1131244212 is 2124421311.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2453662 + ... + 2454122.

It is an arithmetic number, because the mean of its divisors is an integer number (31874304).

Almost surely, 2^1131244212 is an apocalyptic number.

1131244212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131244212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1529966592).

1131244212 is an abundant number, since it is smaller than the sum of its proper divisors (1928688972).

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

1131244212 is a wasteful number, since it uses less digits than its factorization.

1131244212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829 (or 827 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 1131244212 is about 33633.9740738438. The cubic root of 1131244212 is about 1041.9625822995.

Adding to 1131244212 its reverse (2124421311), we get a palindrome (3255665523).

The spelling of 1131244212 in words is "one billion, one hundred thirty-one million, two hundred forty-four thousand, two hundred twelve".