1000210000121 has 2 divisors, whose sum is σ = 1000210000122. Its totient is φ = 1000210000120.

The previous prime is 1000210000093. The next prime is 1000210000147. The reversal of 1000210000121 is 1210000120001.

1000210000121 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., 672498403600 + 327711596521 = 820060^2 + 572461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000210000121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000210000099 and 1000210000108.

It is not a weakly prime, because it can be changed into another prime (1000210030121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500105000060 + 500105000061.

It is an arithmetic number, because the mean of its divisors is an integer number (500105000061).

Almost surely, 2^{1000210000121} is an apocalyptic number.

It is an amenable number.

1000210000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000210000121 is an equidigital number, since it uses as much as digits as its factorization.

1000210000121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1000210000121 its reverse (1210000120001), we get a palindrome (2210210120122).

The spelling of 1000210000121 in words is "one trillion, two hundred ten million, one hundred twenty-one", and thus it is an aban number.