201023210031221 has 16 divisors (see below), whose sum is σ = 202523587584000. Its totient is φ = 199528017044400.

The previous prime is 201023210031187. The next prime is 201023210031311. The reversal of 201023210031221 is 122130012320102.

It is a cyclic number.

It is not a de Polignac number, because 201023210031221 - 2¹⁰ = 201023210030197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201023210031193 and 201023210031202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201053210031221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282843776 + ... + 283553606.

It is an arithmetic number, because the mean of its divisors is an integer number (12657724224000).

Almost surely, 2^{201023210031221} is an apocalyptic number.

It is an amenable number.

201023210031221 is a deficient number, since it is larger than the sum of its proper divisors (1500377552779).

201023210031221 is a wasteful number, since it uses less digits than its factorization.

201023210031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713480.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 201023210031221 its reverse (122130012320102), we get a palindrome (323153222351323).

The spelling of 201023210031221 in words is "two hundred one trillion, twenty-three billion, two hundred ten million, thirty-one thousand, two hundred twenty-one".