21021122202122 has 16 divisors (see below), whose sum is σ = 36039882766272. Its totient is φ = 9008134053120.

The previous prime is 21021122202121. The next prime is 21021122202127. The reversal of 21021122202122 is 22120222112012.

It is a junction number, because it is equal to n+sod(n) for n = 21021122202094 and 21021122202103.

It is not an unprimeable number, because it can be changed into a prime (21021122202121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76384343 + ... + 76659050.

It is an arithmetic number, because the mean of its divisors is an integer number (2252492672892).

Almost surely, 2^{21021122202122} is an apocalyptic number.

21021122202122 is a deficient number, since it is larger than the sum of its proper divisors (15018760564150).

21021122202122 is a wasteful number, since it uses less digits than its factorization.

21021122202122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153053213.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21021122202122 its reverse (22120222112012), we get a palindrome (43141344314134).

The spelling of 21021122202122 in words is "twenty-one trillion, twenty-one billion, one hundred twenty-two million, two hundred two thousand, one hundred twenty-two".