21130342103 has 8 divisors (see below), whose sum is σ = 22763500368. Its totient is φ = 19498290624.

The previous prime is 21130342097. The next prime is 21130342133. The reversal of 21130342103 is 30124303112.

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 21130342103 - 2⁴ = 21130342087 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 (21130342133) 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, 236825 + ... + 313602.

It is an arithmetic number, because the mean of its divisors is an integer number (2845437546).

Almost surely, 2^21130342103 is an apocalyptic number.

21130342103 is a deficient number, since it is larger than the sum of its proper divisors (1633158265).

21130342103 is a wasteful number, since it uses less digits than its factorization.

21130342103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553393.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21130342103 its reverse (30124303112), we get a palindrome (51254645215).

The spelling of 21130342103 in words is "twenty-one billion, one hundred thirty million, three hundred forty-two thousand, one hundred three".