10521403123 has 8 divisors (see below), whose sum is σ = 13117593600. Its totient is φ = 8198495880.

The previous prime is 10521403117. The next prime is 10521403133. The reversal of 10521403123 is 32130412501.

It is a happy number.

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 10521403123 - 2⁹ = 10521402611 is a prime.

It is a super-2 number, since 2×10521403123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10521403094 and 10521403103.

It is not an unprimeable number, because it can be changed into a prime (10521403103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68320723 + ... + 68320876.

It is an arithmetic number, because the mean of its divisors is an integer number (1639699200).

Almost surely, 2^10521403123 is an apocalyptic number.

10521403123 is a deficient number, since it is larger than the sum of its proper divisors (2596190477).

10521403123 is a wasteful number, since it uses less digits than its factorization.

10521403123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136641617.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 10521403123 its reverse (32130412501), we get a palindrome (42651815624).

The spelling of 10521403123 in words is "ten billion, five hundred twenty-one million, four hundred three thousand, one hundred twenty-three".