1211231203212 has 24 divisors (see below), whose sum is σ = 2838547658800. Its totient is φ = 401980660416.

The previous prime is 1211231203211. The next prime is 1211231203223. The reversal of 1211231203212 is 2123021321121.

It is not an unprimeable number, because it can be changed into a prime (1211231203211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220381387 + ... + 220386882.

Almost surely, 2^{1211231203212} is an apocalyptic number.

1211231203212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211231203212 is an abundant number, since it is smaller than the sum of its proper divisors (1627316455588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211231203212 is a wasteful number, since it uses less digits than its factorization.

1211231203212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440768505 (or 440768503 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1211231203212 its reverse (2123021321121), we get a palindrome (3334252524333).

The spelling of 1211231203212 in words is "one trillion, two hundred eleven billion, two hundred thirty-one million, two hundred three thousand, two hundred twelve".