1211312344 has 16 divisors (see below), whose sum is σ = 2477684520. Its totient is φ = 550596480.

The previous prime is 1211312317. The next prime is 1211312351. The reversal of 1211312344 is 4432131121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6882369 + ... + 6882544.

Almost surely, 2^1211312344 is an apocalyptic number.

It is an amenable number.

1211312344 is an abundant number, since it is smaller than the sum of its proper divisors (1266372176).

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

1211312344 is a wasteful number, since it uses less digits than its factorization.

1211312344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13764930 (or 13764926 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 1211312344 is about 34803.9127685380. The cubic root of 1211312344 is about 1065.9873418446.

Adding to 1211312344 its reverse (4432131121), we get a palindrome (5643443465).

The spelling of 1211312344 in words is "one billion, two hundred eleven million, three hundred twelve thousand, three hundred forty-four".