21124504141542 has 48 divisors (see below), whose sum is σ = 47007678753360. Its totient is φ = 6851059465536.

The previous prime is 21124504141529. The next prime is 21124504141583. The reversal of 21124504141542 is 24514140542112.

It is a happy number.

21124504141542 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 4 + 504 + 141 + 5 + 4 + 2 = 666.

It is a super-2 number, since 2×21124504141542² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21124504141497 and 21124504141506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38202309 + ... + 38751327.

It is an arithmetic number, because the mean of its divisors is an integer number (979326640695).

Almost surely, 2^{21124504141542} is an apocalyptic number.

21124504141542 is an abundant number, since it is smaller than the sum of its proper divisors (25883174611818).

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

21124504141542 is a wasteful number, since it uses less digits than its factorization.

21124504141542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606837 (or 606834 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

Adding to 21124504141542 its reverse (24514140542112), we get a palindrome (45638644683654).

The spelling of 21124504141542 in words is "twenty-one trillion, one hundred twenty-four billion, five hundred four million, one hundred forty-one thousand, five hundred forty-two".