10202001221021 has 2 divisors, whose sum is σ = 10202001221022. Its totient is φ = 10202001221020.

The previous prime is 10202001221003. The next prime is 10202001221107. The reversal of 10202001221021 is 12012210020201.

10202001221021 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., 9431317392025 + 770683828996 = 3071045^2 + 877886^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202001221021 - 2³⁸ = 9927123314077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10202001220987 and 10202001221005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10202001521021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101000610510 + 5101000610511.

It is an arithmetic number, because the mean of its divisors is an integer number (5101000610511).

Almost surely, 2^{10202001221021} is an apocalyptic number.

It is an amenable number.

10202001221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202001221021 is an equidigital number, since it uses as much as digits as its factorization.

10202001221021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 10202001221021 its reverse (12012210020201), we get a palindrome (22214211241222).

The spelling of 10202001221021 in words is "ten trillion, two hundred two billion, one million, two hundred twenty-one thousand, twenty-one".