10021012121 has 2 divisors, whose sum is σ = 10021012122. Its totient is φ = 10021012120.

The previous prime is 10021012109. The next prime is 10021012159. The reversal of 10021012121 is 12121012001.

10021012121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8062064521 + 1958947600 = 89789^2 + 44260^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021012121 - 2²² = 10016817817 is a prime.

It is not a weakly prime, because it can be changed into another prime (10021012021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010506060 + 5010506061.

It is an arithmetic number, because the mean of its divisors is an integer number (5010506061).

Almost surely, 2^10021012121 is an apocalyptic number.

It is an amenable number.

10021012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021012121 is an equidigital number, since it uses as much as digits as its factorization.

10021012121 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 11.

Adding to 10021012121 its reverse (12121012001), we get a palindrome (22142024122).

The spelling of 10021012121 in words is "ten billion, twenty-one million, twelve thousand, one hundred twenty-one".