20201002120221 has 16 divisors (see below), whose sum is σ = 29012419062144. Its totient is φ = 12428877956544.

The previous prime is 20201002120199. The next prime is 20201002120241. The reversal of 20201002120221 is 12202120010202.

It is not a de Polignac number, because 20201002120221 - 2⁹ = 20201002119709 is a prime.

It is a super-2 number, since 2×20201002120221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20201002120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201002120241) 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, 52053441 + ... + 52440086.

It is an arithmetic number, because the mean of its divisors is an integer number (1813276191384).

Almost surely, 2^{20201002120221} is an apocalyptic number.

It is an amenable number.

20201002120221 is a deficient number, since it is larger than the sum of its proper divisors (8811416941923).

20201002120221 is a wasteful number, since it uses less digits than its factorization.

20201002120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104498500.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20201002120221 its reverse (12202120010202), we get a palindrome (32403122130423).

The spelling of 20201002120221 in words is "twenty trillion, two hundred one billion, two million, one hundred twenty thousand, two hundred twenty-one".