20011022202122 has 64 divisors (see below), whose sum is σ = 36885808014336. Its totient is φ = 7946637684480.

The previous prime is 20011022202113. The next prime is 20011022202221. The reversal of 20011022202122 is 22120222011002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 20011022202122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27498497 + ... + 28216827.

It is an arithmetic number, because the mean of its divisors is an integer number (576340750224).

Almost surely, 2^{20011022202122} is an apocalyptic number.

20011022202122 is a deficient number, since it is larger than the sum of its proper divisors (16874785812214).

20011022202122 is a wasteful number, since it uses less digits than its factorization.

20011022202122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720171.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20011022202122 its reverse (22120222011002), we get a palindrome (42131244213124).

The spelling of 20011022202122 in words is "twenty trillion, eleven billion, twenty-two million, two hundred two thousand, one hundred twenty-two".