1113213231 has 12 divisors (see below), whose sum is σ = 1731665208. Its totient is φ = 685054224.

The previous prime is 1113213203. The next prime is 1113213247. The reversal of 1113213231 is 1323123111.

1113213231 is a `hidden beast` number, since 111 + 321 + 3 + 231 = 666.

It is not a de Polignac number, because 1113213231 - 2⁷ = 1113213103 is a prime.

It is a super-2 number, since 2×1113213231² = 2478487395346918722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113213251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4757205 + ... + 4757438.

It is an arithmetic number, because the mean of its divisors is an integer number (144305434).

Almost surely, 2^1113213231 is an apocalyptic number.

1113213231 is a deficient number, since it is larger than the sum of its proper divisors (618451977).

1113213231 is a wasteful number, since it uses less digits than its factorization.

1113213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9514662 (or 9514659 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1113213231 is about 33364.8502319432. The cubic root of 1113213231 is about 1036.3969346915.

Adding to 1113213231 its reverse (1323123111), we get a palindrome (2436336342).

The spelling of 1113213231 in words is "one billion, one hundred thirteen million, two hundred thirteen thousand, two hundred thirty-one".