21102000101 has 16 divisors (see below), whose sum is σ = 26009794944. Its totient is φ = 16671593664.

The previous prime is 21102000097. The next prime is 21102000149. The reversal of 21102000101 is 10100020112.

It is a cyclic number.

It is not a de Polignac number, because 21102000101 - 2² = 21102000097 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102000181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107606 + ... + 231911.

It is an arithmetic number, because the mean of its divisors is an integer number (1625612184).

Almost surely, 2^21102000101 is an apocalyptic number.

It is an amenable number.

21102000101 is a deficient number, since it is larger than the sum of its proper divisors (4907794843).

21102000101 is a wasteful number, since it uses less digits than its factorization.

21102000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340220.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21102000101 its reverse (10100020112), we get a palindrome (31202020213).

The spelling of 21102000101 in words is "twenty-one billion, one hundred two million, one hundred one", and thus it is an aban number.