220211012221 has 2 divisors, whose sum is σ = 220211012222. Its totient is φ = 220211012220.

The previous prime is 220211012179. The next prime is 220211012291. The reversal of 220211012221 is 122210112022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184780479321 + 35430532900 = 429861^2 + 188230^2 .

It is a cyclic number.

It is not a de Polignac number, because 220211012221 - 2⁷ = 220211012093 is a prime.

It is a super-2 number, since 2×220211012221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220211012195 and 220211012204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220211012291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110105506110 + 110105506111.

It is an arithmetic number, because the mean of its divisors is an integer number (110105506111).

Almost surely, 2^220211012221 is an apocalyptic number.

It is an amenable number.

220211012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

220211012221 is an equidigital number, since it uses as much as digits as its factorization.

220211012221 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 16.

Adding to 220211012221 its reverse (122210112022), we get a palindrome (342421124243).

The spelling of 220211012221 in words is "two hundred twenty billion, two hundred eleven million, twelve thousand, two hundred twenty-one".