210021000210001 has 2 divisors, whose sum is σ = 210021000210002. Its totient is φ = 210021000210000.

The previous prime is 210021000209953. The next prime is 210021000210023. The reversal of 210021000210001 is 100012000120012.

210021000210001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210004151910400 + 16848299601 = 14491520^2 + 129801^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021000210001 - 2²³ = 210020991821393 is a prime.

It is a super-2 number, since 2×210021000210001² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210021000210001.

It is not a weakly prime, because it can be changed into another prime (210021000210041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010500105000 + 105010500105001.

It is an arithmetic number, because the mean of its divisors is an integer number (105010500105001).

Almost surely, 2^{210021000210001} is an apocalyptic number.

It is an amenable number.

210021000210001 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021000210001 is an equidigital number, since it uses as much as digits as its factorization.

210021000210001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 210021000210001 its reverse (100012000120012), we get a palindrome (310033000330013).

The spelling of 210021000210001 in words is "two hundred ten trillion, twenty-one billion, two hundred ten thousand, one".