1131021232 has 20 divisors (see below), whose sum is σ = 2390567976. Its totient is φ = 514100480.

The previous prime is 1131021223. The next prime is 1131021239. The reversal of 1131021232 is 2321201311.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1131021239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3212953 + ... + 3213304.

Almost surely, 2^1131021232 is an apocalyptic number.

It is an amenable number.

1131021232 is an abundant number, since it is smaller than the sum of its proper divisors (1259546744).

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

1131021232 is a wasteful number, since it uses less digits than its factorization.

1131021232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6426276 (or 6426270 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1131021232 is about 33630.6591074276. The cubic root of 1131021232 is about 1041.8941172468.

Adding to 1131021232 its reverse (2321201311), we get a palindrome (3452222543).

The spelling of 1131021232 in words is "one billion, one hundred thirty-one million, twenty-one thousand, two hundred thirty-two".