1131212238 has 16 divisors (see below), whose sum is σ = 2436457296. Its totient is φ = 348065280.

The previous prime is 1131212237. The next prime is 1131212273. The reversal of 1131212238 is 8322121311.

It is a super-2 number, since 2×1131212238² = 2559282254801937288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131212237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7251283 + ... + 7251438.

It is an arithmetic number, because the mean of its divisors is an integer number (152278581).

Almost surely, 2^1131212238 is an apocalyptic number.

1131212238 is an abundant number, since it is smaller than the sum of its proper divisors (1305245058).

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

1131212238 is a wasteful number, since it uses less digits than its factorization.

1131212238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14502739.

The product of its digits is 576, while the sum is 24.

The square root of 1131212238 is about 33633.4987475285. The cubic root of 1131212238 is about 1041.9527653725.

Adding to 1131212238 its reverse (8322121311), we get a palindrome (9453333549).

The spelling of 1131212238 in words is "one billion, one hundred thirty-one million, two hundred twelve thousand, two hundred thirty-eight".