2110221200621 has 2 divisors, whose sum is σ = 2110221200622. Its totient is φ = 2110221200620.

The previous prime is 2110221200579. The next prime is 2110221200629. The reversal of 2110221200621 is 1260021220112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1728735854596 + 381485346025 = 1314814^2 + 617645^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110221200621 - 2¹⁴ = 2110221184237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2110221200593 and 2110221200602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2110221200629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055110600310 + 1055110600311.

It is an arithmetic number, because the mean of its divisors is an integer number (1055110600311).

Almost surely, 2^{2110221200621} is an apocalyptic number.

It is an amenable number.

2110221200621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2110221200621 is an equidigital number, since it uses as much as digits as its factorization.

2110221200621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2110221200621 its reverse (1260021220112), we get a palindrome (3370242420733).

The spelling of 2110221200621 in words is "two trillion, one hundred ten billion, two hundred twenty-one million, two hundred thousand, six hundred twenty-one".