21010001102011 has 4 divisors (see below), whose sum is σ = 21010023105952. Its totient is φ = 21009979098072.

The previous prime is 21010001102003. The next prime is 21010001102033. The reversal of 21010001102011 is 11020110001012.

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 21010001102011 - 2³ = 21010001102003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010001102071) 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 3 ways as a sum of consecutive naturals, for example, 9501516 + ... + 11502121.

It is an arithmetic number, because the mean of its divisors is an integer number (5252505776488).

Almost surely, 2^{21010001102011} is an apocalyptic number.

21010001102011 is a deficient number, since it is larger than the sum of its proper divisors (22003941).

21010001102011 is a wasteful number, since it uses less digits than its factorization.

21010001102011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22003940.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21010001102011 its reverse (11020110001012), we get a palindrome (32030111103023).

The spelling of 21010001102011 in words is "twenty-one trillion, ten billion, one million, one hundred two thousand, eleven".