21220220313111 has 8 divisors (see below), whose sum is σ = 28331913456640. Its totient is φ = 14127670355832.

The previous prime is 21220220313041. The next prime is 21220220313113. The reversal of 21220220313111 is 11131302202212.

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

It is not a de Polignac number, because 21220220313111 - 2⁷ = 21220220312983 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 (21220220313113) 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, 4785793975 + ... + 4785798408.

It is an arithmetic number, because the mean of its divisors is an integer number (3541489182080).

Almost surely, 2^{21220220313111} is an apocalyptic number.

21220220313111 is a deficient number, since it is larger than the sum of its proper divisors (7111693143529).

21220220313111 is an equidigital number, since it uses as much as digits as its factorization.

21220220313111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9571593125.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21220220313111 its reverse (11131302202212), we get a palindrome (32351522515323).

The spelling of 21220220313111 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty million, three hundred thirteen thousand, one hundred eleven".