21130122103 has 16 divisors (see below), whose sum is σ = 23552462016. Its totient is φ = 18854133760.

The previous prime is 21130122043. The next prime is 21130122109. The reversal of 21130122103 is 30122103112.

It is a cyclic number.

It is not a de Polignac number, because 21130122103 - 2⁹ = 21130121591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130122109) 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, 194938 + ... + 283303.

It is an arithmetic number, because the mean of its divisors is an integer number (1472028876).

Almost surely, 2^21130122103 is an apocalyptic number.

21130122103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21130122103 is a deficient number, since it is larger than the sum of its proper divisors (2422339913).

21130122103 is a wasteful number, since it uses less digits than its factorization.

21130122103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478394.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21130122103 its reverse (30122103112), we get a palindrome (51252225215).

The spelling of 21130122103 in words is "twenty-one billion, one hundred thirty million, one hundred twenty-two thousand, one hundred three".