1211233031212 has 12 divisors (see below), whose sum is σ = 2244343557960. Its totient is φ = 569992014656.

The previous prime is 1211233031209. The next prime is 1211233031219. The reversal of 1211233031212 is 2121303321121.

It is not an unprimeable number, because it can be changed into a prime (1211233031219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8906125162 + ... + 8906125297.

It is an arithmetic number, because the mean of its divisors is an integer number (187028629830).

Almost surely, 2^{1211233031212} is an apocalyptic number.

It is an amenable number.

1211233031212 is a deficient number, since it is larger than the sum of its proper divisors (1033110526748).

1211233031212 is a wasteful number, since it uses less digits than its factorization.

1211233031212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17812250480 (or 17812250478 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1211233031212 its reverse (2121303321121), we get a palindrome (3332536352333).

The spelling of 1211233031212 in words is "one trillion, two hundred eleven billion, two hundred thirty-three million, thirty-one thousand, two hundred twelve".