210102011112121 has 2 divisors, whose sum is σ = 210102011112122. Its totient is φ = 210102011112120.

The previous prime is 210102011112101. The next prime is 210102011112127. The reversal of 210102011112121 is 121211110201012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127361065710096 + 82740945402025 = 11285436^2 + 9096205^2 .

It is a cyclic number.

It is not a de Polignac number, because 210102011112121 - 2⁵ = 210102011112089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210102011112095 and 210102011112104.

It is not a weakly prime, because it can be changed into another prime (210102011112127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105051005556060 + 105051005556061.

It is an arithmetic number, because the mean of its divisors is an integer number (105051005556061).

Almost surely, 2^{210102011112121} is an apocalyptic number.

It is an amenable number.

210102011112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210102011112121 is an equidigital number, since it uses as much as digits as its factorization.

210102011112121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 210102011112121 its reverse (121211110201012), we get a palindrome (331313121313133).

The spelling of 210102011112121 in words is "two hundred ten trillion, one hundred two billion, eleven million, one hundred twelve thousand, one hundred twenty-one".