20210101211 has 8 divisors (see below), whose sum is σ = 21449767104. Its totient is φ = 18976083840.

The previous prime is 20210101199. The next prime is 20210101217. The reversal of 20210101211 is 11210101202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20210101211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20210101192 and 20210101201.

It is not an unprimeable number, because it can be changed into a prime (20210101217) 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, 1404755 + ... + 1419068.

It is an arithmetic number, because the mean of its divisors is an integer number (2681220888).

Almost surely, 2^20210101211 is an apocalyptic number.

20210101211 is a deficient number, since it is larger than the sum of its proper divisors (1239665893).

20210101211 is a wasteful number, since it uses less digits than its factorization.

20210101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824261.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20210101211 its reverse (11210101202), we get a palindrome (31420202413).

Subtracting from 20210101211 its reverse (11210101202), we obtain a palindrome (9000000009).

The spelling of 20210101211 in words is "twenty billion, two hundred ten million, one hundred one thousand, two hundred eleven".