21523118102124 has 24 divisors (see below), whose sum is σ = 51577922660208. Its totient is φ = 6980470735680.

The previous prime is 21523118102117. The next prime is 21523118102197. The reversal of 21523118102124 is 42120181132512.

It is a super-2 number, since 2×21523118102124² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24237745167 + ... + 24237746054.

It is an arithmetic number, because the mean of its divisors is an integer number (2149080110842).

Almost surely, 2^{21523118102124} is an apocalyptic number.

It is an amenable number.

21523118102124 is an abundant number, since it is smaller than the sum of its proper divisors (30054804558084).

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

21523118102124 is a wasteful number, since it uses less digits than its factorization.

21523118102124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48475491265 (or 48475491263 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

Adding to 21523118102124 its reverse (42120181132512), we get a palindrome (63643299234636).

The spelling of 21523118102124 in words is "twenty-one trillion, five hundred twenty-three billion, one hundred eighteen million, one hundred two thousand, one hundred twenty-four".