1211200443243 has 24 divisors (see below), whose sum is σ = 1999844901600. Its totient is φ = 691975073664.

The previous prime is 1211200443227. The next prime is 1211200443247. The reversal of 1211200443243 is 3423440021121.

1211200443243 is a `hidden beast` number, since 1 + 2 + 11 + 200 + 443 + 2 + 4 + 3 = 666.

It is not a de Polignac number, because 1211200443243 - 2⁴ = 1211200443227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211200443247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1621488 + ... + 2247581.

It is an arithmetic number, because the mean of its divisors is an integer number (83326870900).

Almost surely, 2^{1211200443243} is an apocalyptic number.

1211200443243 is a deficient number, since it is larger than the sum of its proper divisors (788644458357).

1211200443243 is a wasteful number, since it uses less digits than its factorization.

1211200443243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3874051 (or 3874048 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 1211200443243 its reverse (3423440021121), we get a palindrome (4634640464364).

The spelling of 1211200443243 in words is "one trillion, two hundred eleven billion, two hundred million, four hundred forty-three thousand, two hundred forty-three".