21002122022122 has 32 divisors (see below), whose sum is σ = 31691483062272. Its totient is φ = 10438507335024.

The previous prime is 21002122022117. The next prime is 21002122022179. The reversal of 21002122022122 is 22122022120012.

It is a self number, because there is not a number n which added to its sum of digits gives 21002122022122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596176273 + ... + 596211499.

It is an arithmetic number, because the mean of its divisors is an integer number (990358845696).

Almost surely, 2^{21002122022122} is an apocalyptic number.

21002122022122 is a deficient number, since it is larger than the sum of its proper divisors (10689361040150).

21002122022122 is a wasteful number, since it uses less digits than its factorization.

21002122022122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38202.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21002122022122 its reverse (22122022120012), we get a palindrome (43124144142134).

The spelling of 21002122022122 in words is "twenty-one trillion, two billion, one hundred twenty-two million, twenty-two thousand, one hundred twenty-two".