1211201334221 has 32 divisors (see below), whose sum is σ = 1274609952000. Its totient is φ = 1149430302720.

The previous prime is 1211201334209. The next prime is 1211201334223. The reversal of 1211201334221 is 1224331021121.

It is not a de Polignac number, because 1211201334221 - 2¹⁸ = 1211201072077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211201334223) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 258194486 + ... + 258199176.

It is an arithmetic number, because the mean of its divisors is an integer number (39831561000).

Almost surely, 2^{1211201334221} is an apocalyptic number.

It is an amenable number.

1211201334221 is a deficient number, since it is larger than the sum of its proper divisors (63408617779).

1211201334221 is a wasteful number, since it uses less digits than its factorization.

1211201334221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5429.

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

Adding to 1211201334221 its reverse (1224331021121), we get a palindrome (2435532355342).

The spelling of 1211201334221 in words is "one trillion, two hundred eleven billion, two hundred one million, three hundred thirty-four thousand, two hundred twenty-one".