10212010021 has 2 divisors, whose sum is σ = 10212010022. Its totient is φ = 10212010020.

The previous prime is 10212010001. The next prime is 10212010037. The reversal of 10212010021 is 12001021201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9669772225 + 542237796 = 98335^2 + 23286^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212010021 - 2⁵ = 10212009989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10212010001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106005010 + 5106005011.

It is an arithmetic number, because the mean of its divisors is an integer number (5106005011).

Almost surely, 2^10212010021 is an apocalyptic number.

It is an amenable number.

10212010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212010021 is an equidigital number, since it uses as much as digits as its factorization.

10212010021 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 10.

Adding to 10212010021 its reverse (12001021201), we get a palindrome (22213031222).

The spelling of 10212010021 in words is "ten billion, two hundred twelve million, ten thousand, twenty-one".