21020212110211 has 32 divisors (see below), whose sum is σ = 22885812000000. Its totient is φ = 19242498360960.

The previous prime is 21020212110197. The next prime is 21020212110221. The reversal of 21020212110211 is 11201121202012.

It is a cyclic number.

It is not a de Polignac number, because 21020212110211 - 2¹¹ = 21020212108163 is a prime.

It is a super-2 number, since 2×21020212110211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020212110221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102400585 + ... + 102605653.

It is an arithmetic number, because the mean of its divisors is an integer number (715181625000).

Almost surely, 2^{21020212110211} is an apocalyptic number.

21020212110211 is a deficient number, since it is larger than the sum of its proper divisors (1865599889789).

21020212110211 is a wasteful number, since it uses less digits than its factorization.

21020212110211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206707.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21020212110211 its reverse (11201121202012), we get a palindrome (32221333312223).

The spelling of 21020212110211 in words is "twenty-one trillion, twenty billion, two hundred twelve million, one hundred ten thousand, two hundred eleven".