210120112211021 has 2 divisors, whose sum is σ = 210120112211022. Its totient is φ = 210120112211020.

The previous prime is 210120112210991. The next prime is 210120112211039. The reversal of 210120112211021 is 120112211021012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197428071828100 + 12692040382921 = 14050910^2 + 3562589^2 .

It is a cyclic number.

It is not a de Polignac number, because 210120112211021 - 2¹⁴ = 210120112194637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210120112211521) 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, 105060056105510 + 105060056105511.

It is an arithmetic number, because the mean of its divisors is an integer number (105060056105511).

Almost surely, 2^{210120112211021} is an apocalyptic number.

It is an amenable number.

210120112211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

210120112211021 is an equidigital number, since it uses as much as digits as its factorization.

210120112211021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210120112211021 its reverse (120112211021012), we get a palindrome (330232323232033).

The spelling of 210120112211021 in words is "two hundred ten trillion, one hundred twenty billion, one hundred twelve million, two hundred eleven thousand, twenty-one".