21042132334044 has 48 divisors (see below), whose sum is σ = 49143827322912. Its totient is φ = 7007542198272.

The previous prime is 21042132334039. The next prime is 21042132334057. The reversal of 21042132334044 is 44043323124012.

It is a junction number, because it is equal to n+sod(n) for n = 21042132333996 and 21042132334014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306197832 + ... + 306266544.

It is an arithmetic number, because the mean of its divisors is an integer number (1023829735894).

Almost surely, 2^{21042132334044} is an apocalyptic number.

It is an amenable number.

21042132334044 is an abundant number, since it is smaller than the sum of its proper divisors (28101694988868).

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

21042132334044 is a wasteful number, since it uses less digits than its factorization.

21042132334044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92006 (or 92004 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 21042132334044 its reverse (44043323124012), we get a palindrome (65085455458056).

The spelling of 21042132334044 in words is "twenty-one trillion, forty-two billion, one hundred thirty-two million, three hundred thirty-four thousand, forty-four".