1311122101445 has 64 divisors (see below), whose sum is σ = 1736836758720. Its totient is φ = 944317440000.

The previous prime is 1311122101417. The next prime is 1311122101451. The reversal of 1311122101445 is 5441012211131.

It can be written as a sum of positive squares in 32 ways, for example, as 572101627876 + 739020473569 = 756374^2 + 859663^2 .

It is not a de Polignac number, because 1311122101445 - 2¹⁸ = 1311121839301 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 161842895 + ... + 161850995.

It is an arithmetic number, because the mean of its divisors is an integer number (27138074355).

Almost surely, 2^{1311122101445} is an apocalyptic number.

It is an amenable number.

1311122101445 is a deficient number, since it is larger than the sum of its proper divisors (425714657275).

1311122101445 is a wasteful number, since it uses less digits than its factorization.

1311122101445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8586.

The product of its (nonzero) digits is 960, while the sum is 26.

Adding to 1311122101445 its reverse (5441012211131), we get a palindrome (6752134312576).

The spelling of 1311122101445 in words is "one trillion, three hundred eleven billion, one hundred twenty-two million, one hundred one thousand, four hundred forty-five".