21130643103 has 8 divisors (see below), whose sum is σ = 28231574016. Its totient is φ = 14058403800.

The previous prime is 21130643077. The next prime is 21130643113. The reversal of 21130643103 is 30134603112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21130643103 - 2¹⁷ = 21130512031 is a prime.

It is a super-2 number, since 2×21130643103² (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 (21130643113) 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, 7171183 + ... + 7174128.

It is an arithmetic number, because the mean of its divisors is an integer number (3528946752).

Almost surely, 2^21130643103 is an apocalyptic number.

21130643103 is a deficient number, since it is larger than the sum of its proper divisors (7100930913).

21130643103 is a wasteful number, since it uses less digits than its factorization.

21130643103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14345805.

The product of its (nonzero) digits is 1296, while the sum is 24.

The spelling of 21130643103 in words is "twenty-one billion, one hundred thirty million, six hundred forty-three thousand, one hundred three".