21001110210011 has 4 divisors (see below), whose sum is σ = 21254135634312. Its totient is φ = 20748084785712.

The previous prime is 21001110209993. The next prime is 21001110210029. The reversal of 21001110210011 is 11001201110012.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21001110209993) and next prime (21001110210029).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21001110210011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21001110209974 and 21001110210001.

It is not an unprimeable number, because it can be changed into a prime (21001110210211) 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, 126512712026 + ... + 126512712191.

It is an arithmetic number, because the mean of its divisors is an integer number (5313533908578).

Almost surely, 2^{21001110210011} is an apocalyptic number.

21001110210011 is a deficient number, since it is larger than the sum of its proper divisors (253025424301).

21001110210011 is an equidigital number, since it uses as much as digits as its factorization.

21001110210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253025424300.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21001110210011 its reverse (11001201110012), we get a palindrome (32002311320023).

Subtracting from 21001110210011 its reverse (11001201110012), we obtain a palindrome (9999909099999).

The spelling of 21001110210011 in words is "twenty-one trillion, one billion, one hundred ten million, two hundred ten thousand, eleven".