21224156560044 has 24 divisors (see below), whose sum is σ = 49533002523648. Its totient is φ = 7073294489040.

The previous prime is 21224156559979. The next prime is 21224156560051. The reversal of 21224156560044 is 44006565142212.

It is a junction number, because it is equal to n+sod(n) for n = 21224156559978 and 21224156560005.

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, 177983452 + ... + 178102659.

It is an arithmetic number, because the mean of its divisors is an integer number (2063875105152).

Almost surely, 2^{21224156560044} is an apocalyptic number.

It is an amenable number.

21224156560044 is an abundant number, since it is smaller than the sum of its proper divisors (28308845963604).

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

21224156560044 is a wasteful number, since it uses less digits than its factorization.

21224156560044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356091085 (or 356091083 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 21224156560044 in words is "twenty-one trillion, two hundred twenty-four billion, one hundred fifty-six million, five hundred sixty thousand, forty-four".