1021201201221 has 32 divisors (see below), whose sum is σ = 1425376908288. Its totient is φ = 649105079040.

The previous prime is 1021201201193. The next prime is 1021201201261. The reversal of 1021201201221 is 1221021021201.

1021201201221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1021201201221 - 2¹⁰ = 1021201200197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021201201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021201201261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100004806 + ... + 100015016.

It is an arithmetic number, because the mean of its divisors is an integer number (44543028384).

Almost surely, 2^{1021201201221} is an apocalyptic number.

It is an amenable number.

1021201201221 is a deficient number, since it is larger than the sum of its proper divisors (404175707067).

1021201201221 is a wasteful number, since it uses less digits than its factorization.

1021201201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14761.

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

Adding to 1021201201221 its reverse (1221021021201), we get a palindrome (2242222222422).

The spelling of 1021201201221 in words is "one trillion, twenty-one billion, two hundred one million, two hundred one thousand, two hundred twenty-one".