1131234321 has 32 divisors (see below), whose sum is σ = 1768935168. Its totient is φ = 629544960.

The previous prime is 1131234311. The next prime is 1131234329. The reversal of 1131234321 is 1234321311.

It is not a de Polignac number, because 1131234321 - 2¹⁷ = 1131103249 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1131234329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 871545 + ... + 872841.

It is an arithmetic number, because the mean of its divisors is an integer number (55279224).

Almost surely, 2^1131234321 is an apocalyptic number.

It is an amenable number.

1131234321 is a deficient number, since it is larger than the sum of its proper divisors (637700847).

1131234321 is a wasteful number, since it uses less digits than its factorization.

1131234321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361.

The product of its digits is 432, while the sum is 21.

The square root of 1131234321 is about 33633.8270346983. The cubic root of 1131234321 is about 1041.9595455010.

Adding to 1131234321 its reverse (1234321311), we get a palindrome (2365555632).

The spelling of 1131234321 in words is "one billion, one hundred thirty-one million, two hundred thirty-four thousand, three hundred twenty-one".