1133211231 has 24 divisors (see below), whose sum is σ = 1699176960. Its totient is φ = 726987600.

The previous prime is 1133211229. The next prime is 1133211239. The reversal of 1133211231 is 1321123311.

1133211231 is a `hidden beast` number, since 113 + 321 + 1 + 231 = 666.

It is not a de Polignac number, because 1133211231 - 2¹ = 1133211229 is a prime.

It is a super-2 number, since 2×1133211231² = 2568335388129070722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133211239) 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, 38596 + ... + 61286.

It is an arithmetic number, because the mean of its divisors is an integer number (70799040).

Almost surely, 2^1133211231 is an apocalyptic number.

1133211231 is a deficient number, since it is larger than the sum of its proper divisors (565965729).

1133211231 is a wasteful number, since it uses less digits than its factorization.

1133211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22907 (or 22904 counting only the distinct ones).

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

The square root of 1133211231 is about 33663.2029224790. The cubic root of 1133211231 is about 1042.5661576634.

Adding to 1133211231 its reverse (1321123311), we get a palindrome (2454334542).

The spelling of 1133211231 in words is "one billion, one hundred thirty-three million, two hundred eleven thousand, two hundred thirty-one".