21168471320124 has 24 divisors (see below), whose sum is σ = 49589885011968. Its totient is φ = 7028044926000.

The previous prime is 21168471320123. The next prime is 21168471320149. The reversal of 21168471320124 is 42102317486112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21168471320123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3514019452 + ... + 3514025475.

It is an arithmetic number, because the mean of its divisors is an integer number (2066245208832).

Almost surely, 2^{21168471320124} is an apocalyptic number.

It is an amenable number.

21168471320124 is an abundant number, since it is smaller than the sum of its proper divisors (28421413691844).

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

21168471320124 is a wasteful number, since it uses less digits than its factorization.

21168471320124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7028045185 (or 7028045183 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 21168471320124 in words is "twenty-one trillion, one hundred sixty-eight billion, four hundred seventy-one million, three hundred twenty thousand, one hundred twenty-four".