20201221100211 has 8 divisors (see below), whose sum is σ = 28352591017920. Its totient is φ = 12758665957992.

The previous prime is 20201221100209. The next prime is 20201221100251. The reversal of 20201221100211 is 11200112210202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20201221100211 - 2¹ = 20201221100209 is a prime.

It is a super-2 number, since 2×20201221100211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20201221100251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177203693805 + ... + 177203693918.

It is an arithmetic number, because the mean of its divisors is an integer number (3544073877240).

Almost surely, 2^{20201221100211} is an apocalyptic number.

20201221100211 is a deficient number, since it is larger than the sum of its proper divisors (8151369917709).

20201221100211 is a wasteful number, since it uses less digits than its factorization.

20201221100211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354407387745.

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

Adding to 20201221100211 its reverse (11200112210202), we get a palindrome (31401333310413).

The spelling of 20201221100211 in words is "twenty trillion, two hundred one billion, two hundred twenty-one million, one hundred thousand, two hundred eleven".