2101403244221 has 2 divisors, whose sum is σ = 2101403244222. Its totient is φ = 2101403244220.

The previous prime is 2101403244217. The next prime is 2101403244233. The reversal of 2101403244221 is 1224423041012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1944591204196 + 156812040025 = 1394486^2 + 395995^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101403244221 - 2² = 2101403244217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101403244211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050701622110 + 1050701622111.

It is an arithmetic number, because the mean of its divisors is an integer number (1050701622111).

Almost surely, 2^{2101403244221} is an apocalyptic number.

It is an amenable number.

2101403244221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101403244221 is an equidigital number, since it uses as much as digits as its factorization.

2101403244221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 2101403244221 its reverse (1224423041012), we get a palindrome (3325826285233).

The spelling of 2101403244221 in words is "two trillion, one hundred one billion, four hundred three million, two hundred forty-four thousand, two hundred twenty-one".