21012333104424 has 128 divisors (see below), whose sum is σ = 53787681216000. Its totient is φ = 6838670592000.

The previous prime is 21012333104419. The next prime is 21012333104453. The reversal of 21012333104424 is 42440133321012.

It is a junction number, because it is equal to n+sod(n) for n = 21012333104391 and 21012333104400.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158684004 + ... + 158816364.

It is an arithmetic number, because the mean of its divisors is an integer number (420216259500).

Almost surely, 2^{21012333104424} is an apocalyptic number.

21012333104424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21012333104424 is an abundant number, since it is smaller than the sum of its proper divisors (32775348111576).

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

21012333104424 is a wasteful number, since it uses less digits than its factorization.

21012333104424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133379 (or 133375 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 21012333104424 its reverse (42440133321012), we get a palindrome (63452466425436).

The spelling of 21012333104424 in words is "twenty-one trillion, twelve billion, three hundred thirty-three million, one hundred four thousand, four hundred twenty-four".