21001001110011 has 24 divisors (see below), whose sum is σ = 32668381382000. Its totient is φ = 12923630709696.

The previous prime is 21001001109983. The next prime is 21001001110073. The reversal of 21001001110011 is 11001110010012.

It is not a de Polignac number, because 21001001110011 - 2²¹ = 21000999012859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21001001109975 and 21001001110002.

It is not an unprimeable number, because it can be changed into a prime (21001001110711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40165740 + ... + 40685238.

Almost surely, 2^{21001001110011} is an apocalyptic number.

21001001110011 is a deficient number, since it is larger than the sum of its proper divisors (11667380271989).

21001001110011 is a wasteful number, since it uses less digits than its factorization.

21001001110011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865035 (or 865032 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 21001001110011 its reverse (11001110010012), we get a palindrome (32002111120023).

The spelling of 21001001110011 in words is "twenty-one trillion, one billion, one million, one hundred ten thousand, eleven".