20210221001211 has 32 divisors (see below), whose sum is σ = 30218021418240. Its totient is φ = 11939803398144.

The previous prime is 20210221001153. The next prime is 20210221001213. The reversal of 20210221001211 is 11210012201202.

It is not a de Polignac number, because 20210221001211 - 2¹⁹ = 20210220476923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20210221001213) 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 31 ways as a sum of consecutive naturals, for example, 63819910 + ... + 64135803.

It is an arithmetic number, because the mean of its divisors is an integer number (944313169320).

Almost surely, 2^{20210221001211} is an apocalyptic number.

20210221001211 is a deficient number, since it is larger than the sum of its proper divisors (10007800417029).

20210221001211 is a wasteful number, since it uses less digits than its factorization.

20210221001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127955915.

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

Adding to 20210221001211 its reverse (11210012201202), we get a palindrome (31420233202413).

The spelling of 20210221001211 in words is "twenty trillion, two hundred ten billion, two hundred twenty-one million, one thousand, two hundred eleven".