1201221122212 has 24 divisors (see below), whose sum is σ = 2121801204600. Its totient is φ = 594994173696.

The previous prime is 1201221122161. The next prime is 1201221122243. The reversal of 1201221122212 is 2122211221021.

It can be written as a sum of positive squares in 4 ways, for example, as 75809912896 + 1125411209316 = 275336^2 + 1060854^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1201221122212.

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, 2228688 + ... + 2714680.

It is an arithmetic number, because the mean of its divisors is an integer number (88408383525).

Almost surely, 2^{1201221122212} is an apocalyptic number.

It is an amenable number.

1201221122212 is a deficient number, since it is larger than the sum of its proper divisors (920580082388).

1201221122212 is a wasteful number, since it uses less digits than its factorization.

1201221122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491775 (or 491773 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1201221122212 its reverse (2122211221021), we get a palindrome (3323432343233).

The spelling of 1201221122212 in words is "one trillion, two hundred one billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred twelve".