20202120211 has 16 divisors (see below), whose sum is σ = 24873928128. Its totient is φ = 15977808000.

The previous prime is 20202120181. The next prime is 20202120259. The reversal of 20202120211 is 11202120202.

It is a happy number.

It is not a de Polignac number, because 20202120211 - 2²³ = 20193731603 is a prime.

It is a super-2 number, since 2×20202120211² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 20202120191 and 20202120200.

It is not an unprimeable number, because it can be changed into a prime (20202120271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196161 + ... + 280861.

It is an arithmetic number, because the mean of its divisors is an integer number (1554620508).

Almost surely, 2^20202120211 is an apocalyptic number.

20202120211 is a deficient number, since it is larger than the sum of its proper divisors (4671807917).

20202120211 is a wasteful number, since it uses less digits than its factorization.

20202120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87342.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20202120211 its reverse (11202120202), we get a palindrome (31404240413).

Subtracting from 20202120211 its reverse (11202120202), we obtain a palindrome (9000000009).

The spelling of 20202120211 in words is "twenty billion, two hundred two million, one hundred twenty thousand, two hundred eleven".