220000211021 has 2 divisors, whose sum is σ = 220000211022. Its totient is φ = 220000211020.

The previous prime is 220000210993. The next prime is 220000211027. The reversal of 220000211021 is 120112000022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204873916900 + 15126294121 = 452630^2 + 122989^2 .

It is a cyclic number.

It is not a de Polignac number, because 220000211021 - 2⁶ = 220000210957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220000210993 and 220000211011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220000211027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110000105510 + 110000105511.

It is an arithmetic number, because the mean of its divisors is an integer number (110000105511).

Almost surely, 2^220000211021 is an apocalyptic number.

It is an amenable number.

220000211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220000211021 is an equidigital number, since it uses as much as digits as its factorization.

220000211021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220000211021 its reverse (120112000022), we get a palindrome (340112211043).

The spelling of 220000211021 in words is "two hundred twenty billion, two hundred eleven thousand, twenty-one".