1021201221201 has 24 divisors (see below), whose sum is σ = 1586107025280. Its totient is φ = 582731890272.

The previous prime is 1021201221199. The next prime is 1021201221217. The reversal of 1021201221201 is 1021221021201.

It is not a de Polignac number, because 1021201221201 - 2¹ = 1021201221199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021201225201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4725286 + ... + 4936671.

It is an arithmetic number, because the mean of its divisors is an integer number (66087792720).

Almost surely, 2^{1021201221201} is an apocalyptic number.

It is an amenable number.

1021201221201 is a deficient number, since it is larger than the sum of its proper divisors (564905804079).

1021201221201 is an equidigital number, since it uses as much as digits as its factorization.

1021201221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9662693 (or 9662686 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1021201221201 its reverse (1021221021201), we get a palindrome (2042422242402).

The spelling of 1021201221201 in words is "one trillion, twenty-one billion, two hundred one million, two hundred twenty-one thousand, two hundred one".