1211310243212 has 6 divisors (see below), whose sum is σ = 2119792925628. Its totient is φ = 605655121604.

The previous prime is 1211310243203. The next prime is 1211310243217. The reversal of 1211310243212 is 2123420131121.

It is not an unprimeable number, because it can be changed into a prime (1211310243217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151413780398 + ... + 151413780405.

It is an arithmetic number, because the mean of its divisors is an integer number (353298820938).

Almost surely, 2^{1211310243212} is an apocalyptic number.

It is an amenable number.

1211310243212 is a deficient number, since it is larger than the sum of its proper divisors (908482682416).

1211310243212 is a wasteful number, since it uses less digits than its factorization.

1211310243212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302827560807 (or 302827560805 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 1211310243212 its reverse (2123420131121), we get a palindrome (3334730374333).

The spelling of 1211310243212 in words is "one trillion, two hundred eleven billion, three hundred ten million, two hundred forty-three thousand, two hundred twelve".