21010021110011 has 8 divisors (see below), whose sum is σ = 21131998272000. Its totient is φ = 20888095089960.

The previous prime is 21010021110007. The next prime is 21010021110103. The reversal of 21010021110011 is 11001112001012.

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

It is a cyclic number.

It is not a de Polignac number, because 21010021110011 - 2² = 21010021110007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010021109974 and 21010021110001.

It is not an unprimeable number, because it can be changed into a prime (21010021119011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11961311 + ... + 13604888.

It is an arithmetic number, because the mean of its divisors is an integer number (2641499784000).

Almost surely, 2^{21010021110011} is an apocalyptic number.

21010021110011 is a deficient number, since it is larger than the sum of its proper divisors (121977161989).

21010021110011 is a wasteful number, since it uses less digits than its factorization.

21010021110011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25570969.

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

Adding to 21010021110011 its reverse (11001112001012), we get a palindrome (32011133111023).

The spelling of 21010021110011 in words is "twenty-one trillion, ten billion, twenty-one million, one hundred ten thousand, eleven".