1201221101212 has 24 divisors (see below), whose sum is σ = 2293279157232. Its totient is φ = 546000336000.

The previous prime is 1201221101203. The next prime is 1201221101233. The reversal of 1201221101212 is 2121011221021.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2856958 + ... + 3250330.

It is an arithmetic number, because the mean of its divisors is an integer number (95553298218).

Almost surely, 2^{1201221101212} is an apocalyptic number.

It is an amenable number.

1201221101212 is a deficient number, since it is larger than the sum of its proper divisors (1092058056020).

1201221101212 is a wasteful number, since it uses less digits than its factorization.

1201221101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462789 (or 462787 counting only the distinct ones).

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

Adding to 1201221101212 its reverse (2121011221021), we get a palindrome (3322232322233).

The spelling of 1201221101212 in words is "one trillion, two hundred one billion, two hundred twenty-one million, one hundred one thousand, two hundred twelve".