10211201200021 has 2 divisors, whose sum is σ = 10211201200022. Its totient is φ = 10211201200020.

The previous prime is 10211201200009. The next prime is 10211201200103. The reversal of 10211201200021 is 12000210211201.

10211201200021 is digitally balanced in base 2, 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., 5276645439025 + 4934555760996 = 2297095^2 + 2221386^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211201200021 - 2⁷ = 10211201199893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10211201199974 and 10211201200010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10211201900021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105600600010 + 5105600600011.

It is an arithmetic number, because the mean of its divisors is an integer number (5105600600011).

Almost surely, 2^{10211201200021} is an apocalyptic number.

It is an amenable number.

10211201200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211201200021 is an equidigital number, since it uses as much as digits as its factorization.

10211201200021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10211201200021 its reverse (12000210211201), we get a palindrome (22211411411222).

The spelling of 10211201200021 in words is "ten trillion, two hundred eleven billion, two hundred one million, two hundred thousand, twenty-one".