2221120201021 has 2 divisors, whose sum is σ = 2221120201022. Its totient is φ = 2221120201020.

The previous prime is 2221120200911. The next prime is 2221120201049. The reversal of 2221120201021 is 1201020211222.

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., 2152470436900 + 68649764121 = 1467130^2 + 262011^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221120201021 - 2¹⁹ = 2221119676733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221120200986 and 2221120201004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221120201051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110560100510 + 1110560100511.

It is an arithmetic number, because the mean of its divisors is an integer number (1110560100511).

Almost surely, 2^{2221120201021} is an apocalyptic number.

It is an amenable number.

2221120201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221120201021 is an equidigital number, since it uses as much as digits as its factorization.

2221120201021 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 2221120201021 its reverse (1201020211222), we get a palindrome (3422140412243).

The spelling of 2221120201021 in words is "two trillion, two hundred twenty-one billion, one hundred twenty million, two hundred one thousand, twenty-one".