1211244240013 has 16 divisors (see below), whose sum is σ = 1235275223616. Its totient is φ = 1187396496000.

The previous prime is 1211244240001. The next prime is 1211244240053. The reversal of 1211244240013 is 3100424421121.

It is a cyclic number.

It is not a de Polignac number, because 1211244240013 - 2⁵ = 1211244239981 is a prime.

It is a super-2 number, since 2×1211244240013² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211244240013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211244240053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20032495 + ... + 20092867.

It is an arithmetic number, because the mean of its divisors is an integer number (77204701476).

Almost surely, 2^{1211244240013} is an apocalyptic number.

It is an amenable number.

1211244240013 is a deficient number, since it is larger than the sum of its proper divisors (24030983603).

1211244240013 is a wasteful number, since it uses less digits than its factorization.

1211244240013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61884.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 1211244240013 its reverse (3100424421121), we get a palindrome (4311668661134).

The spelling of 1211244240013 in words is "one trillion, two hundred eleven billion, two hundred forty-four million, two hundred forty thousand, thirteen".