21111034524 has 24 divisors (see below), whose sum is σ = 49331860368. Its totient is φ = 7026614400.

The previous prime is 21111034481. The next prime is 21111034531. The reversal of 21111034524 is 42543011112.

It is a junction number, because it is equal to n+sod(n) for n = 21111034494 and 21111034503.

It is a congruent number.

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, 1291177 + ... + 1307424.

It is an arithmetic number, because the mean of its divisors is an integer number (2055494182).

Almost surely, 2^21111034524 is an apocalyptic number.

It is an amenable number.

21111034524 is an abundant number, since it is smaller than the sum of its proper divisors (28220825844).

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

21111034524 is a wasteful number, since it uses less digits than its factorization.

21111034524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599285 (or 2599283 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 21111034524 its reverse (42543011112), we get a palindrome (63654045636).

The spelling of 21111034524 in words is "twenty-one billion, one hundred eleven million, thirty-four thousand, five hundred twenty-four".