21112001114221 has 2 divisors, whose sum is σ = 21112001114222. Its totient is φ = 21112001114220.

The previous prime is 21112001114173. The next prime is 21112001114263. The reversal of 21112001114221 is 12241110021112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17674128891721 + 3437872222500 = 4204061^2 + 1854150^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112001114221 - 2¹¹ = 21112001112173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112001114291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556000557110 + 10556000557111.

It is an arithmetic number, because the mean of its divisors is an integer number (10556000557111).

Almost surely, 2^{21112001114221} is an apocalyptic number.

It is an amenable number.

21112001114221 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112001114221 is an equidigital number, since it uses as much as digits as its factorization.

21112001114221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21112001114221 its reverse (12241110021112), we get a palindrome (33353111135333).

The spelling of 21112001114221 in words is "twenty-one trillion, one hundred twelve billion, one million, one hundred fourteen thousand, two hundred twenty-one".