21541151212324 has 48 divisors (see below), whose sum is σ = 38828250720000. Its totient is φ = 10452102515712.

The previous prime is 21541151212289. The next prime is 21541151212327. The reversal of 21541151212324 is 42321215114512.

It is a self number, because there is not a number n which added to its sum of digits gives 21541151212324.

It is not an unprimeable number, because it can be changed into a prime (21541151212327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105590932 + ... + 105794740.

It is an arithmetic number, because the mean of its divisors is an integer number (808921890000).

Almost surely, 2^{21541151212324} is an apocalyptic number.

It is an amenable number.

21541151212324 is a deficient number, since it is larger than the sum of its proper divisors (17287099507676).

21541151212324 is a wasteful number, since it uses less digits than its factorization.

21541151212324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209620 (or 209618 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

Adding to 21541151212324 its reverse (42321215114512), we get a palindrome (63862366326836).

The spelling of 21541151212324 in words is "twenty-one trillion, five hundred forty-one billion, one hundred fifty-one million, two hundred twelve thousand, three hundred twenty-four".