21003410124 has 36 divisors (see below), whose sum is σ = 53579045520. Its totient is φ = 6936904800.

The previous prime is 21003410119. The next prime is 21003410143. The reversal of 21003410124 is 42101430012.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×21003410124² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21003410097 and 21003410106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2672352 + ... + 2680199.

It is an arithmetic number, because the mean of its divisors is an integer number (1488306820).

Almost surely, 2^21003410124 is an apocalyptic number.

It is an amenable number.

21003410124 is an abundant number, since it is smaller than the sum of its proper divisors (32575635396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21003410124 is a wasteful number, since it uses less digits than its factorization.

21003410124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352670 (or 5352665 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21003410124 its reverse (42101430012), we get a palindrome (63104840136).

The spelling of 21003410124 in words is "twenty-one billion, three million, four hundred ten thousand, one hundred twenty-four".