210010001120021 has 2 divisors, whose sum is σ = 210010001120022. Its totient is φ = 210010001120020.

The previous prime is 210010001119993. The next prime is 210010001120047. The reversal of 210010001120021 is 120021100010012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164661224897521 + 45348776222500 = 12832039^2 + 6734150^2 .

It is a cyclic number.

It is not a de Polignac number, because 210010001120021 - 2⁶ = 210010001119957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210010001119984 and 210010001120011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210010001122021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105005000560010 + 105005000560011.

It is an arithmetic number, because the mean of its divisors is an integer number (105005000560011).

Almost surely, 2^{210010001120021} is an apocalyptic number.

It is an amenable number.

210010001120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

210010001120021 is an equidigital number, since it uses as much as digits as its factorization.

210010001120021 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 210010001120021 its reverse (120021100010012), we get a palindrome (330031101130033).

The spelling of 210010001120021 in words is "two hundred ten trillion, ten billion, one million, one hundred twenty thousand, twenty-one".