20211020011 has 8 divisors (see below), whose sum is σ = 24875101664. Its totient is φ = 15991136640.

The previous prime is 20211019991. The next prime is 20211020021. The reversal of 20211020011 is 11002011202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20211020011 - 2¹¹ = 20211017963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20211020011.

It is not an unprimeable number, because it can be changed into a prime (20211020021) 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 7 ways as a sum of consecutive naturals, for example, 111049470 + ... + 111049651.

It is an arithmetic number, because the mean of its divisors is an integer number (3109387708).

Almost surely, 2^20211020011 is an apocalyptic number.

20211020011 is a deficient number, since it is larger than the sum of its proper divisors (4664081653).

20211020011 is a wasteful number, since it uses less digits than its factorization.

20211020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222099141.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20211020011 its reverse (11002011202), we get a palindrome (31213031213).

The spelling of 20211020011 in words is "twenty billion, two hundred eleven million, twenty thousand, eleven".