21001101000206 has 16 divisors (see below), whose sum is σ = 33159755408400. Its totient is φ = 9947853272448.

The previous prime is 21001101000181. The next prime is 21001101000223. The reversal of 21001101000206 is 60200010110012.

It is a super-2 number, since 2×21001101000206² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11385680 + ... + 13100988.

It is an arithmetic number, because the mean of its divisors is an integer number (2072484713025).

Almost surely, 2^{21001101000206} is an apocalyptic number.

21001101000206 is a deficient number, since it is larger than the sum of its proper divisors (12158654408194).

21001101000206 is a wasteful number, since it uses less digits than its factorization.

21001101000206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2037523.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21001101000206 its reverse (60200010110012), we get a palindrome (81201111110218).

The spelling of 21001101000206 in words is "twenty-one trillion, one billion, one hundred one million, two hundred six", and thus it is an aban number.