21003123024124 has 12 divisors (see below), whose sum is σ = 36755620196400. Its totient is φ = 10501517253728.

The previous prime is 21003123024097. The next prime is 21003123024127. The reversal of 21003123024124 is 42142032130012.

It is a super-2 number, since 2×21003123024124² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003123024127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9985129 + ... + 11904160.

It is an arithmetic number, because the mean of its divisors is an integer number (3062968349700).

Almost surely, 2^{21003123024124} is an apocalyptic number.

It is an amenable number.

21003123024124 is a deficient number, since it is larger than the sum of its proper divisors (15752497172276).

21003123024124 is a wasteful number, since it uses less digits than its factorization.

21003123024124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22129172 (or 22129170 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21003123024124 its reverse (42142032130012), we get a palindrome (63145155154136).

The spelling of 21003123024124 in words is "twenty-one trillion, three billion, one hundred twenty-three million, twenty-four thousand, one hundred twenty-four".