1211343331203 has 48 divisors (see below), whose sum is σ = 1803904745760. Its totient is φ = 782926290432.

The previous prime is 1211343331201. The next prime is 1211343331267. The reversal of 1211343331203 is 3021333431121.

1211343331203 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 343 + 3 + 312 + 0 + 3 = 666.

It is not a de Polignac number, because 1211343331203 - 2¹ = 1211343331201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211343331201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74157225 + ... + 74173557.

It is an arithmetic number, because the mean of its divisors is an integer number (37581348870).

Almost surely, 2^{1211343331203} is an apocalyptic number.

1211343331203 is a deficient number, since it is larger than the sum of its proper divisors (592561414557).

1211343331203 is a wasteful number, since it uses less digits than its factorization.

1211343331203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18228 (or 18225 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 1211343331203 its reverse (3021333431121), we get a palindrome (4232676762324).

The spelling of 1211343331203 in words is "one trillion, two hundred eleven billion, three hundred forty-three million, three hundred thirty-one thousand, two hundred three".