21022100011 has 4 divisors (see below), whose sum is σ = 22933200024. Its totient is φ = 19111000000.

The previous prime is 21022100009. The next prime is 21022100053. The reversal of 21022100011 is 11000122012.

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 21022100011 - 2¹ = 21022100009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022104011) 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, 955549990 + ... + 955550011.

It is an arithmetic number, because the mean of its divisors is an integer number (5733300006).

Almost surely, 2^21022100011 is an apocalyptic number.

21022100011 is a deficient number, since it is larger than the sum of its proper divisors (1911100013).

21022100011 is a wasteful number, since it uses less digits than its factorization.

21022100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911100012.

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

Adding to 21022100011 its reverse (11000122012), we get a palindrome (32022222023).

The spelling of 21022100011 in words is "twenty-one billion, twenty-two million, one hundred thousand, eleven".