20110200212221 has 12 divisors (see below), whose sum is σ = 23393571455100. Its totient is φ = 17237260494720.

The previous prime is 20110200212197. The next prime is 20110200212269. The reversal of 20110200212221 is 12221200201102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6469956919321 + 13640243292900 = 2543611^2 + 3693270^2 .

It is not a de Polignac number, because 20110200212221 - 2¹⁷ = 20110200081149 is a prime.

It is a super-2 number, since 2×20110200212221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20110200212195 and 20110200212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110200212021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28718341 + ... + 29410261.

It is an arithmetic number, because the mean of its divisors is an integer number (1949464287925).

Almost surely, 2^{20110200212221} is an apocalyptic number.

It is an amenable number.

20110200212221 is a deficient number, since it is larger than the sum of its proper divisors (3283371242879).

20110200212221 is an equidigital number, since it uses as much as digits as its factorization.

20110200212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285084 (or 1285077 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20110200212221 its reverse (12221200201102), we get a palindrome (32331400413323).

The spelling of 20110200212221 in words is "twenty trillion, one hundred ten billion, two hundred million, two hundred twelve thousand, two hundred twenty-one".