1213311344 has 30 divisors (see below), whose sum is σ = 2734595064. Its totient is φ = 519990240.

The previous prime is 1213311343. The next prime is 1213311353. The reversal of 1213311344 is 4431133121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213311343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 773012 + ... + 774579.

Almost surely, 2^1213311344 is an apocalyptic number.

1213311344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1213311344 is an abundant number, since it is smaller than the sum of its proper divisors (1521283720).

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

1213311344 is a wasteful number, since it uses less digits than its factorization.

1213311344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547613 (or 1547600 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 1213311344 is about 34832.6189655616. The cubic root of 1213311344 is about 1066.5734107707.

Adding to 1213311344 its reverse (4431133121), we get a palindrome (5644444465).

The spelling of 1213311344 in words is "one billion, two hundred thirteen million, three hundred eleven thousand, three hundred forty-four".