1211333010221 has 8 divisors (see below), whose sum is σ = 1276228930080. Its totient is φ = 1146551245488.

The previous prime is 1211333010187. The next prime is 1211333010263. The reversal of 1211333010221 is 1220103331121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211333010221 - 2³⁸ = 936455103277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211333010193 and 1211333010202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211333010271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28516991 + ... + 28559436.

It is an arithmetic number, because the mean of its divisors is an integer number (159528616260).

Almost surely, 2^{1211333010221} is an apocalyptic number.

It is an amenable number.

1211333010221 is a deficient number, since it is larger than the sum of its proper divisors (64895919859).

1211333010221 is a wasteful number, since it uses less digits than its factorization.

1211333010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57077563.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1211333010221 its reverse (1220103331121), we get a palindrome (2431436341342).

The spelling of 1211333010221 in words is "one trillion, two hundred eleven billion, three hundred thirty-three million, ten thousand, two hundred twenty-one".