1211344334321 has 6 divisors (see below), whose sum is σ = 1331477656866. Its totient is φ = 1101222122000.

The previous prime is 1211344334243. The next prime is 1211344334363. The reversal of 1211344334321 is 1234334431121.

It can be written as a sum of positive squares in only one way, i.e., 1072912714225 + 138431620096 = 1035815^2 + 372064^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1211344334321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211344334621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5005554980 + ... + 5005555221.

It is an arithmetic number, because the mean of its divisors is an integer number (221912942811).

Almost surely, 2^{1211344334321} is an apocalyptic number.

1211344334321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211344334321 is a deficient number, since it is larger than the sum of its proper divisors (120133322545).

1211344334321 is a wasteful number, since it uses less digits than its factorization.

1211344334321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10011110223 (or 10011110212 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

Adding to 1211344334321 its reverse (1234334431121), we get a palindrome (2445678765442).

The spelling of 1211344334321 in words is "one trillion, two hundred eleven billion, three hundred forty-four million, three hundred thirty-four thousand, three hundred twenty-one".