21128048822 has 16 divisors (see below), whose sum is σ = 32732007552. Its totient is φ = 10217746560.

The previous prime is 21128048807. The next prime is 21128048833. The reversal of 21128048822 is 22884082112.

It is a happy number.

It is a congruent number.

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, 25598 + ... + 207150.

It is an arithmetic number, because the mean of its divisors is an integer number (2045750472).

Almost surely, 2^21128048822 is an apocalyptic number.

21128048822 is a deficient number, since it is larger than the sum of its proper divisors (11603958730).

21128048822 is a wasteful number, since it uses less digits than its factorization.

21128048822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183463.

The product of its (nonzero) digits is 32768, while the sum is 38.

The spelling of 21128048822 in words is "twenty-one billion, one hundred twenty-eight million, forty-eight thousand, eight hundred twenty-two".