21000000001011 has 8 divisors (see below), whose sum is σ = 28000041544080. Its totient is φ = 13999979229312.

The previous prime is 21000000001003. The next prime is 21000000001027. The reversal of 21000000001011 is 11010000000012.

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

It is not a de Polignac number, because 21000000001011 - 2³ = 21000000001003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000000001811) 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 7 ways as a sum of consecutive naturals, for example, 2656906 + ... + 7004223.

It is an arithmetic number, because the mean of its divisors is an integer number (3500005193010).

Almost surely, 2^{21000000001011} is an apocalyptic number.

21000000001011 is a deficient number, since it is larger than the sum of its proper divisors (7000041543069).

21000000001011 is an equidigital number, since it uses as much as digits as its factorization.

21000000001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10385685.

The product of its (nonzero) digits is 2, while the sum is 6.

Adding to 21000000001011 its reverse (11010000000012), we get a palindrome (32010000001023).

Subtracting from 21000000001011 its reverse (11010000000012), we obtain a palindrome (9990000000999).

The spelling of 21000000001011 in words is "twenty-one trillion, one thousand, eleven".