2221202130221 has 2 divisors, whose sum is σ = 2221202130222. Its totient is φ = 2221202130220.

The previous prime is 2221202130167. The next prime is 2221202130227. The reversal of 2221202130221 is 1220312021222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1238744514121 + 982457616100 = 1112989^2 + 991190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221202130221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221202130193 and 2221202130202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221202130227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110601065110 + 1110601065111.

It is an arithmetic number, because the mean of its divisors is an integer number (1110601065111).

Almost surely, 2^{2221202130221} is an apocalyptic number.

It is an amenable number.

2221202130221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221202130221 is an equidigital number, since it uses as much as digits as its factorization.

2221202130221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 2221202130221 its reverse (1220312021222), we get a palindrome (3441514151443).

The spelling of 2221202130221 in words is "two trillion, two hundred twenty-one billion, two hundred two million, one hundred thirty thousand, two hundred twenty-one".