210021112110101 has 2 divisors, whose sum is σ = 210021112110102. Its totient is φ = 210021112110100.

The previous prime is 210021112110071. The next prime is 210021112110193. The reversal of 210021112110101 is 101011211120012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131153480355076 + 78867631755025 = 11452226^2 + 8880745^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021112110101 - 2¹⁴ = 210021112093717 is a prime.

It is a super-2 number, since 2×210021112110101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210021112140101) 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, 105010556055050 + 105010556055051.

It is an arithmetic number, because the mean of its divisors is an integer number (105010556055051).

Almost surely, 2^{210021112110101} is an apocalyptic number.

It is an amenable number.

210021112110101 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021112110101 is an equidigital number, since it uses as much as digits as its factorization.

210021112110101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 210021112110101 its reverse (101011211120012), we get a palindrome (311032323230113).

The spelling of 210021112110101 in words is "two hundred ten trillion, twenty-one billion, one hundred twelve million, one hundred ten thousand, one hundred one".