1131043212 has 72 divisors (see below), whose sum is σ = 3129504560. Its totient is φ = 342299520.

The previous prime is 1131043211. The next prime is 1131043213. The reversal of 1131043212 is 2123401311.

It is an interprime number because it is at equal distance from previous prime (1131043211) and next prime (1131043213).

It is a super-2 number, since 2×1131043212² = 2558517494822553888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1131043211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8739 + ... + 48357.

Almost surely, 2^1131043212 is an apocalyptic number.

1131043212 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 1131043212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1564752280).

1131043212 is an abundant number, since it is smaller than the sum of its proper divisors (1998461348).

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

1131043212 is a wasteful number, since it uses less digits than its factorization.

1131043212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39703 (or 39698 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1131043212 is about 33630.9858909905. The cubic root of 1131043212 is about 1041.9008665113.

Adding to 1131043212 its reverse (2123401311), we get a palindrome (3254444523).

The spelling of 1131043212 in words is "one billion, one hundred thirty-one million, forty-three thousand, two hundred twelve".