1211342342144 has 96 divisors (see below), whose sum is σ = 2727520024320. Its totient is φ = 532848230400.

The previous prime is 1211342342107. The next prime is 1211342342167. The reversal of 1211342342144 is 4412432431121.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1211342342144.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168899 + ... + 1565634.

It is an arithmetic number, because the mean of its divisors is an integer number (28411666920).

Almost surely, 2^{1211342342144} is an apocalyptic number.

It is an amenable number.

1211342342144 is an abundant number, since it is smaller than the sum of its proper divisors (1516177682176).

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

1211342342144 is a wasteful number, since it uses less digits than its factorization.

1211342342144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734597 (or 1734577 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

Adding to 1211342342144 its reverse (4412432431121), we get a palindrome (5623774773265).

The spelling of 1211342342144 in words is "one trillion, two hundred eleven billion, three hundred forty-two million, three hundred forty-two thousand, one hundred forty-four".