20210001211 has 4 divisors (see below), whose sum is σ = 20210347552. Its totient is φ = 20209654872.

The previous prime is 20210001179. The next prime is 20210001221. The reversal of 20210001211 is 11210001202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20210001211 - 2⁵ = 20210001179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210001221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61740 + ... + 210313.

It is an arithmetic number, because the mean of its divisors is an integer number (5052586888).

Almost surely, 2^20210001211 is an apocalyptic number.

20210001211 is a deficient number, since it is larger than the sum of its proper divisors (346341).

20210001211 is an equidigital number, since it uses as much as digits as its factorization.

20210001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346340.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20210001211 its reverse (11210001202), we get a palindrome (31420002413).

Subtracting from 20210001211 its reverse (11210001202), we obtain a palindrome (9000000009).

The spelling of 20210001211 in words is "twenty billion, two hundred ten million, one thousand, two hundred eleven".