21424800664222 has 4 divisors (see below), whose sum is σ = 32137200996336. Its totient is φ = 10712400332110.

The previous prime is 21424800664193. The next prime is 21424800664243. The reversal of 21424800664222 is 22246600842412.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5356200166054 + ... + 5356200166057.

It is an arithmetic number, because the mean of its divisors is an integer number (8034300249084).

Almost surely, 2^{21424800664222} is an apocalyptic number.

21424800664222 is a deficient number, since it is larger than the sum of its proper divisors (10712400332114).

21424800664222 is a wasteful number, since it uses less digits than its factorization.

21424800664222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10712400332113.

The product of its (nonzero) digits is 589824, while the sum is 43.

The spelling of 21424800664222 in words is "twenty-one trillion, four hundred twenty-four billion, eight hundred million, six hundred sixty-four thousand, two hundred twenty-two".