1311211122044 has 24 divisors (see below), whose sum is σ = 2350478196528. Its totient is φ = 639678332160.

The previous prime is 1311211121999. The next prime is 1311211122047. The reversal of 1311211122044 is 4402211121131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311211122047) 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, 3888797 + ... + 4212500.

It is an arithmetic number, because the mean of its divisors is an integer number (97936591522).

Almost surely, 2^{1311211122044} is an apocalyptic number.

It is an amenable number.

1311211122044 is a deficient number, since it is larger than the sum of its proper divisors (1039267074484).

1311211122044 is a wasteful number, since it uses less digits than its factorization.

1311211122044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8102285 (or 8102283 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 1311211122044 its reverse (4402211121131), we get a palindrome (5713422243175).

The spelling of 1311211122044 in words is "one trillion, three hundred eleven billion, two hundred eleven million, one hundred twenty-two thousand, forty-four".