20211030011 has 4 divisors (see below), whose sum is σ = 20211891024. Its totient is φ = 20210169000.

The previous prime is 20211029983. The next prime is 20211030043. The reversal of 20211030011 is 11003011202.

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

It is a cyclic number.

It is not a de Polignac number, because 20211030011 - 2⁶ = 20211029947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211029974 and 20211030001.

It is not an unprimeable number, because it can be changed into a prime (20211032011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394280 + ... + 442581.

It is an arithmetic number, because the mean of its divisors is an integer number (5052972756).

Almost surely, 2^20211030011 is an apocalyptic number.

20211030011 is a deficient number, since it is larger than the sum of its proper divisors (861013).

20211030011 is an equidigital number, since it uses as much as digits as its factorization.

20211030011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861012.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20211030011 its reverse (11003011202), we get a palindrome (31214041213).

The spelling of 20211030011 in words is "twenty billion, two hundred eleven million, thirty thousand, eleven".