211120201021221 has 12 divisors (see below), whose sum is σ = 305036512155648. Its totient is φ = 140707518828264.

The previous prime is 211120201021193. The next prime is 211120201021283. The reversal of 211120201021221 is 122120102021112.

211120201021221 is a `hidden beast` number, since 211 + 1 + 20 + 201 + 0 + 212 + 21 = 666.

It is not a de Polignac number, because 211120201021221 - 2⁶ = 211120201021157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211120201021194 and 211120201021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211120201021321) 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 11 ways as a sum of consecutive naturals, for example, 3273453675 + ... + 3273518168.

It is an arithmetic number, because the mean of its divisors is an integer number (25419709346304).

Almost surely, 2^{211120201021221} is an apocalyptic number.

It is an amenable number.

211120201021221 is a deficient number, since it is larger than the sum of its proper divisors (93916311134427).

211120201021221 is a wasteful number, since it uses less digits than its factorization.

211120201021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6546975432 (or 6546975429 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211120201021221 its reverse (122120102021112), we get a palindrome (333240303042333).

The spelling of 211120201021221 in words is "two hundred eleven trillion, one hundred twenty billion, two hundred one million, twenty-one thousand, two hundred twenty-one".