1211242142444 has 24 divisors (see below), whose sum is σ = 2151947076720. Its totient is φ = 596405468736.

The previous prime is 1211242142419. The next prime is 1211242142489. The reversal of 1211242142444 is 4442412421121.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1211242142444.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241454 + ... + 1575050.

It is an arithmetic number, because the mean of its divisors is an integer number (89664461530).

Almost surely, 2^{1211242142444} is an apocalyptic number.

It is an amenable number.

1211242142444 is a deficient number, since it is larger than the sum of its proper divisors (940704934276).

1211242142444 is a wasteful number, since it uses less digits than its factorization.

1211242142444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337057 (or 1337055 counting only the distinct ones).

The product of its digits is 16384, while the sum is 32.

Adding to 1211242142444 its reverse (4442412421121), we get a palindrome (5653654563565).

The spelling of 1211242142444 in words is "one trillion, two hundred eleven billion, two hundred forty-two million, one hundred forty-two thousand, four hundred forty-four".