20210201012221 has 24 divisors (see below), whose sum is σ = 22271393404800. Its totient is φ = 18188183424000.

The previous prime is 20210201012219. The next prime is 20210201012227. The reversal of 20210201012221 is 12221010201202.

It is a happy number.

It is not a de Polignac number, because 20210201012221 - 2¹ = 20210201012219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20210201012195 and 20210201012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210201012227) 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, 1139942685 + ... + 1139960413.

It is an arithmetic number, because the mean of its divisors is an integer number (927974725200).

Almost surely, 2^{20210201012221} is an apocalyptic number.

It is an amenable number.

20210201012221 is a deficient number, since it is larger than the sum of its proper divisors (2061192392579).

20210201012221 is a wasteful number, since it uses less digits than its factorization.

20210201012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28101 (or 28000 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20210201012221 its reverse (12221010201202), we get a palindrome (32431211213423).

The spelling of 20210201012221 in words is "twenty trillion, two hundred ten billion, two hundred one million, twelve thousand, two hundred twenty-one".