21021002010011 has 8 divisors (see below), whose sum is σ = 21207818338560. Its totient is φ = 20834911182568.

The previous prime is 21021002009993. The next prime is 21021002010031. The reversal of 21021002010011 is 11001020012012.

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 21021002010011 - 2¹⁰ = 21021002008987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21021002009974 and 21021002010001.

It is not an unprimeable number, because it can be changed into a prime (21021002010031) 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, 181317071 + ... + 181432968.

It is an arithmetic number, because the mean of its divisors is an integer number (2650977292320).

Almost surely, 2^{21021002010011} is an apocalyptic number.

21021002010011 is a deficient number, since it is larger than the sum of its proper divisors (186816328549).

21021002010011 is a wasteful number, since it uses less digits than its factorization.

21021002010011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362750553.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21021002010011 its reverse (11001020012012), we get a palindrome (32022022022023).

The spelling of 21021002010011 in words is "twenty-one trillion, twenty-one billion, two million, ten thousand, eleven".