1211203120233 has 16 divisors (see below), whose sum is σ = 1653760380096. Its totient is φ = 788211977280.

The previous prime is 1211203120229. The next prime is 1211203120243. The reversal of 1211203120233 is 3320213021121.

It is not a de Polignac number, because 1211203120233 - 2² = 1211203120229 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211203120223) 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, 19302763 + ... + 19365408.

It is an arithmetic number, because the mean of its divisors is an integer number (103360023756).

Almost surely, 2^{1211203120233} is an apocalyptic number.

It is an amenable number.

1211203120233 is a deficient number, since it is larger than the sum of its proper divisors (442557259863).

1211203120233 is a wasteful number, since it uses less digits than its factorization.

1211203120233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38668424.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1211203120233 its reverse (3320213021121), we get a palindrome (4531416141354).

The spelling of 1211203120233 in words is "one trillion, two hundred eleven billion, two hundred three million, one hundred twenty thousand, two hundred thirty-three".