21002122111022 has 16 divisors (see below), whose sum is σ = 33955929546000. Its totient is φ = 9684880100352.

The previous prime is 21002122111013. The next prime is 21002122111027. The reversal of 21002122111022 is 22011122120012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002122111027) 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, 350262272 + ... + 350322227.

It is an arithmetic number, because the mean of its divisors is an integer number (2122245596625).

Almost surely, 2^{21002122111022} is an apocalyptic number.

21002122111022 is a deficient number, since it is larger than the sum of its proper divisors (12953807434978).

21002122111022 is a wasteful number, since it uses less digits than its factorization.

21002122111022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700585667.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21002122111022 its reverse (22011122120012), we get a palindrome (43013244231034).

The spelling of 21002122111022 in words is "twenty-one trillion, two billion, one hundred twenty-two million, one hundred eleven thousand, twenty-two".