1211311344 has 20 divisors (see below), whose sum is σ = 3129221096. Its totient is φ = 403770432.

The previous prime is 1211311327. The next prime is 1211311373. The reversal of 1211311344 is 4431131121.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1211311344.

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, 12617779 + ... + 12617874.

Almost surely, 2^1211311344 is an apocalyptic number.

It is an amenable number.

1211311344 is an abundant number, since it is smaller than the sum of its proper divisors (1917909752).

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

1211311344 is a wasteful number, since it uses less digits than its factorization.

1211311344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25235664 (or 25235658 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 1211311344 is about 34803.8984023342. The cubic root of 1211311344 is about 1065.9870485023.

Adding to 1211311344 its reverse (4431131121), we get a palindrome (5642442465).

The spelling of 1211311344 in words is "one billion, two hundred eleven million, three hundred eleven thousand, three hundred forty-four".