21002202222001 has 48 divisors (see below), whose sum is σ = 28411454757888. Its totient is φ = 15075707774400.

The previous prime is 21002202221969. The next prime is 21002202222007. The reversal of 21002202222001 is 10022220220012.

It is not a de Polignac number, because 21002202222001 - 2⁵ = 21002202221969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002202222007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4745860 + ... + 8032906.

It is an arithmetic number, because the mean of its divisors is an integer number (591905307456).

Almost surely, 2^{21002202222001} is an apocalyptic number.

It is an amenable number.

21002202222001 is a deficient number, since it is larger than the sum of its proper divisors (7409252535887).

21002202222001 is a wasteful number, since it uses less digits than its factorization.

21002202222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3287582 (or 3287569 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21002202222001 its reverse (10022220220012), we get a palindrome (31024422442013).

The spelling of 21002202222001 in words is "twenty-one trillion, two billion, two hundred two million, two hundred twenty-two thousand, one".