21124432223238 has 16 divisors (see below), whose sum is σ = 42581532672000. Its totient is φ = 6986032703496.

The previous prime is 21124432223231. The next prime is 21124432223267. The reversal of 21124432223238 is 83232223442112.

It is a junction number, because it is equal to n+sod(n) for n = 21124432223196 and 21124432223205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124432223231) 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, 13861175238 + ... + 13861176761.

It is an arithmetic number, because the mean of its divisors is an integer number (2661345792000).

Almost surely, 2^{21124432223238} is an apocalyptic number.

21124432223238 is an abundant number, since it is smaller than the sum of its proper divisors (21457100448762).

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

21124432223238 is a wasteful number, since it uses less digits than its factorization.

21124432223238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27722352131.

The product of its digits is 221184, while the sum is 39.

The spelling of 21124432223238 in words is "twenty-one trillion, one hundred twenty-four billion, four hundred thirty-two million, two hundred twenty-three thousand, two hundred thirty-eight".