211131323220221 has 8 divisors (see below), whose sum is σ = 211193722849824. Its totient is φ = 211068931906800.

The previous prime is 211131323220217. The next prime is 211131323220227. The reversal of 211131323220221 is 122022323131112.

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 211131323220221 - 2² = 211131323220217 is a prime.

It is a super-3 number, since 3×211131323220221³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211131323220227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48888926 + ... + 53031968.

It is an arithmetic number, because the mean of its divisors is an integer number (26399215356228).

Almost surely, 2^{211131323220221} is an apocalyptic number.

It is an amenable number.

211131323220221 is a deficient number, since it is larger than the sum of its proper divisors (62399629603).

211131323220221 is an equidigital number, since it uses as much as digits as its factorization.

211131323220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4158091.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 211131323220221 its reverse (122022323131112), we get a palindrome (333153646351333).

The spelling of 211131323220221 in words is "two hundred eleven trillion, one hundred thirty-one billion, three hundred twenty-three million, two hundred twenty thousand, two hundred twenty-one".