20211000011 has 4 divisors (see below), whose sum is σ = 20411109024. Its totient is φ = 20010891000.

The previous prime is 20210999999. The next prime is 20211000049. The reversal of 20211000011 is 11000011202.

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 20211000011 - 2¹⁸ = 20210737867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211000211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100054355 + ... + 100054556.

It is an arithmetic number, because the mean of its divisors is an integer number (5102777256).

Almost surely, 2^20211000011 is an apocalyptic number.

20211000011 is a deficient number, since it is larger than the sum of its proper divisors (200109013).

20211000011 is a wasteful number, since it uses less digits than its factorization.

20211000011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200109012.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20211000011 its reverse (11000011202), we get a palindrome (31211011213).

It can be divided in two parts, 202 and 11000011, that multiplied together give a palindrome (2222002222).

The spelling of 20211000011 in words is "twenty billion, two hundred eleven million, eleven", and thus it is an aban number.