21131230103 has 8 divisors (see below), whose sum is σ = 21898328400. Its totient is φ = 20366694208.

The previous prime is 21131230093. The next prime is 21131230117. The reversal of 21131230103 is 30103213112.

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 21131230103 - 2³⁰ = 20057488279 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 (21131230123) 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, 623801 + ... + 656802.

It is an arithmetic number, because the mean of its divisors is an integer number (2737291050).

Almost surely, 2^21131230103 is an apocalyptic number.

21131230103 is a deficient number, since it is larger than the sum of its proper divisors (767098297).

21131230103 is a wasteful number, since it uses less digits than its factorization.

21131230103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281201.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21131230103 its reverse (30103213112), we get a palindrome (51234443215).

The spelling of 21131230103 in words is "twenty-one billion, one hundred thirty-one million, two hundred thirty thousand, one hundred three".