1211003231212 has 24 divisors (see below), whose sum is σ = 2172392187840. Its totient is φ = 590415534720.

The previous prime is 1211003231209. The next prime is 1211003231261. The reversal of 1211003231212 is 2121323001121.

It is a self number, because there is not a number n which added to its sum of digits gives 1211003231212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11922489 + ... + 12023632.

It is an arithmetic number, because the mean of its divisors is an integer number (90516341160).

Almost surely, 2^{1211003231212} is an apocalyptic number.

It is an amenable number.

1211003231212 is a deficient number, since it is larger than the sum of its proper divisors (961388956628).

1211003231212 is a wasteful number, since it uses less digits than its factorization.

1211003231212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23946441 (or 23946439 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1211003231212 its reverse (2121323001121), we get a palindrome (3332326232333).

The spelling of 1211003231212 in words is "one trillion, two hundred eleven billion, three million, two hundred thirty-one thousand, two hundred twelve".