1213134231 has 8 divisors (see below), whose sum is σ = 1617856240. Its totient is φ = 808584192.

The previous prime is 1213134203. The next prime is 1213134239. The reversal of 1213134231 is 1324313121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1213134231 - 2¹¹ = 1213132183 is a prime.

It is a super-2 number, since 2×1213134231² = 2943389324847922722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213134198 and 1213134207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213134239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25516 + ... + 55473.

It is an arithmetic number, because the mean of its divisors is an integer number (202232030).

Almost surely, 2^1213134231 is an apocalyptic number.

1213134231 is a deficient number, since it is larger than the sum of its proper divisors (404722009).

1213134231 is an equidigital number, since it uses as much as digits as its factorization.

1213134231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85985.

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

The square root of 1213134231 is about 34830.0765287704. The cubic root of 1213134231 is about 1066.5215105969.

Adding to 1213134231 its reverse (1324313121), we get a palindrome (2537447352).

The spelling of 1213134231 in words is "one billion, two hundred thirteen million, one hundred thirty-four thousand, two hundred thirty-one".