20021104211 has 2 divisors, whose sum is σ = 20021104212. Its totient is φ = 20021104210.

The previous prime is 20021104189. The next prime is 20021104247. The reversal of 20021104211 is 11240112002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20021104211 - 2²² = 20016909907 is a prime.

It is a super-4 number, since 4×20021104211⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (20021104811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010552105 + 10010552106.

It is an arithmetic number, because the mean of its divisors is an integer number (10010552106).

Almost surely, 2^20021104211 is an apocalyptic number.

20021104211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021104211 is an equidigital number, since it uses as much as digits as its factorization.

20021104211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20021104211 its reverse (11240112002), we get a palindrome (31261216213).

The spelling of 20021104211 in words is "twenty billion, twenty-one million, one hundred four thousand, two hundred eleven".