211221130330221 has 8 divisors (see below), whose sum is σ = 307230735025824. Its totient is φ = 128012806260720.

The previous prime is 211221130330183. The next prime is 211221130330291. The reversal of 211221130330221 is 122033031122112.

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

It is not a de Polignac number, because 211221130330221 - 2¹⁰ = 211221130329197 is a prime.

It is a super-2 number, since 2×211221130330221² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211221130330191 and 211221130330200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221130330291) 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, 3200320156486 + ... + 3200320156551.

It is an arithmetic number, because the mean of its divisors is an integer number (38403841878228).

Almost surely, 2^{211221130330221} is an apocalyptic number.

It is an amenable number.

211221130330221 is a deficient number, since it is larger than the sum of its proper divisors (96009604695603).

211221130330221 is a wasteful number, since it uses less digits than its factorization.

211221130330221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6400640313051.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 211221130330221 its reverse (122033031122112), we get a palindrome (333254161452333).

The spelling of 211221130330221 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred thirty million, three hundred thirty thousand, two hundred twenty-one".