10021210102121 has 2 divisors, whose sum is σ = 10021210102122. Its totient is φ = 10021210102120.

The previous prime is 10021210102039. The next prime is 10021210102237. The reversal of 10021210102121 is 12120101212001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5025828650896 + 4995381451225 = 2241836^2 + 2235035^2 .

It is an emirp because it is prime and its reverse (12120101212001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10021210102121 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 = 10021210102096 and 10021210102105.

It is not a weakly prime, because it can be changed into another prime (10021210102021) 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, 5010605051060 + 5010605051061.

It is an arithmetic number, because the mean of its divisors is an integer number (5010605051061).

Almost surely, 2^{10021210102121} is an apocalyptic number.

It is an amenable number.

10021210102121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021210102121 is an equidigital number, since it uses as much as digits as its factorization.

10021210102121 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 14.

Adding to 10021210102121 its reverse (12120101212001), we get a palindrome (22141311314122).

The spelling of 10021210102121 in words is "ten trillion, twenty-one billion, two hundred ten million, one hundred two thousand, one hundred twenty-one".