21002021002022 has 32 divisors (see below), whose sum is σ = 33008789088000. Its totient is φ = 10002952558368.

The previous prime is 21002021002021. The next prime is 21002021002063. The reversal of 21002021002022 is 22020012020012.

It is a junction number, because it is equal to n+sod(n) for n = 21002021001988 and 21002021002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002021002021) 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 15 ways as a sum of consecutive naturals, for example, 10375229 + ... + 12233127.

It is an arithmetic number, because the mean of its divisors is an integer number (1031524659000).

Almost surely, 2^{21002021002022} is an apocalyptic number.

21002021002022 is a deficient number, since it is larger than the sum of its proper divisors (12006768085978).

21002021002022 is a wasteful number, since it uses less digits than its factorization.

21002021002022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858940.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21002021002022 its reverse (22020012020012), we get a palindrome (43022033022034).

The spelling of 21002021002022 in words is "twenty-one trillion, two billion, twenty-one million, two thousand, twenty-two".