10021000201221 has 16 divisors (see below), whose sum is σ = 13398335354880. Its totient is φ = 6662171435520.

The previous prime is 10021000201213. The next prime is 10021000201253. The reversal of 10021000201221 is 12210200012001.

It is not a de Polignac number, because 10021000201221 - 2³ = 10021000201213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10021000201197 and 10021000201206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021000205221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6623245 + ... + 7994333.

It is an arithmetic number, because the mean of its divisors is an integer number (837395959680).

Almost surely, 2^{10021000201221} is an apocalyptic number.

It is an amenable number.

10021000201221 is a deficient number, since it is larger than the sum of its proper divisors (3377335153659).

10021000201221 is a wasteful number, since it uses less digits than its factorization.

10021000201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377836.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10021000201221 its reverse (12210200012001), we get a palindrome (22231200213222).

The spelling of 10021000201221 in words is "ten trillion, twenty-one billion, two hundred one thousand, two hundred twenty-one".