20210120211 has 4 divisors (see below), whose sum is σ = 26946826952. Its totient is φ = 13473413472.

The previous prime is 20210120197. The next prime is 20210120221. The reversal of 20210120211 is 11202101202.

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

It is not a de Polignac number, because 20210120211 - 2⁷ = 20210120083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210120221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3368353366 + ... + 3368353371.

It is an arithmetic number, because the mean of its divisors is an integer number (6736706738).

Almost surely, 2^20210120211 is an apocalyptic number.

20210120211 is a deficient number, since it is larger than the sum of its proper divisors (6736706741).

20210120211 is an equidigital number, since it uses as much as digits as its factorization.

20210120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6736706740.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20210120211 its reverse (11202101202), we get a palindrome (31412221413).

It can be divided in two parts, 202101202 and 11, that multiplied together give a palindrome (2223113222).

The spelling of 20210120211 in words is "twenty billion, two hundred ten million, one hundred twenty thousand, two hundred eleven".