1201221011212 has 6 divisors (see below), whose sum is σ = 2102136769628. Its totient is φ = 600610505604.

The previous prime is 1201221011197. The next prime is 1201221011231. The reversal of 1201221011212 is 2121101221021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150152626398 + ... + 150152626405.

Almost surely, 2^{1201221011212} is an apocalyptic number.

It is an amenable number.

1201221011212 is a deficient number, since it is larger than the sum of its proper divisors (900915758416).

1201221011212 is a wasteful number, since it uses less digits than its factorization.

1201221011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300305252807 (or 300305252805 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1201221011212 its reverse (2121101221021), we get a palindrome (3322322232233).

The spelling of 1201221011212 in words is "one trillion, two hundred one billion, two hundred twenty-one million, eleven thousand, two hundred twelve".