1231213044 has 24 divisors (see below), whose sum is σ = 2882017600. Its totient is φ = 409091904.

The previous prime is 1231213043. The next prime is 1231213051. The reversal of 1231213044 is 4403121321.

It is a self number, because there is not a number n which added to its sum of digits gives 1231213044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231213043) 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, 160144 + ... + 167655.

Almost surely, 2^1231213044 is an apocalyptic number.

It is an amenable number.

1231213044 is an abundant number, since it is smaller than the sum of its proper divisors (1650804556).

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

1231213044 is a wasteful number, since it uses less digits than its factorization.

1231213044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328119 (or 328117 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1231213044 is about 35088.6455138981. The cubic root of 1231213044 is about 1071.7933776514.

Adding to 1231213044 its reverse (4403121321), we get a palindrome (5634334365).

The spelling of 1231213044 in words is "one billion, two hundred thirty-one million, two hundred thirteen thousand, forty-four".