21102101103 has 32 divisors (see below), whose sum is σ = 28932422400. Its totient is φ = 13675274496.

The previous prime is 21102101101. The next prime is 21102101117. The reversal of 21102101103 is 30110120112.

It is not a de Polignac number, because 21102101103 - 2¹ = 21102101101 is a prime.

It is a super-2 number, since 2×21102101103² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102101101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20708128 + ... + 20709146.

It is an arithmetic number, because the mean of its divisors is an integer number (904138200).

Almost surely, 2^21102101103 is an apocalyptic number.

21102101103 is a deficient number, since it is larger than the sum of its proper divisors (7830321297).

21102101103 is a wasteful number, since it uses less digits than its factorization.

21102101103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21102101103 its reverse (30110120112), we get a palindrome (51212221215).

The spelling of 21102101103 in words is "twenty-one billion, one hundred two million, one hundred one thousand, one hundred three".