21011004034124 has 48 divisors (see below), whose sum is σ = 42614262575136. Its totient is φ = 8977329792000.

The previous prime is 21011004034117. The next prime is 21011004034127. The reversal of 21011004034124 is 42143040011012.

It is a self number, because there is not a number n which added to its sum of digits gives 21011004034124.

It is not an unprimeable number, because it can be changed into a prime (21011004034127) 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, 194766602 + ... + 194874449.

It is an arithmetic number, because the mean of its divisors is an integer number (887797136982).

Almost surely, 2^{21011004034124} is an apocalyptic number.

It is an amenable number.

21011004034124 is an abundant number, since it is smaller than the sum of its proper divisors (21603258541012).

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

21011004034124 is a wasteful number, since it uses less digits than its factorization.

21011004034124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389641146 (or 389641144 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21011004034124 its reverse (42143040011012), we get a palindrome (63154044045136).

The spelling of 21011004034124 in words is "twenty-one trillion, eleven billion, four million, thirty-four thousand, one hundred twenty-four".