21002012210022 has 16 divisors (see below), whose sum is σ = 42008157576000. Its totient is φ = 6999981877352.

The previous prime is 21002012209967. The next prime is 21002012210041. The reversal of 21002012210022 is 22001221020012.

It is a junction number, because it is equal to n+sod(n) for n = 21002012209983 and 21002012210010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172148772 + ... + 172270727.

It is an arithmetic number, because the mean of its divisors is an integer number (2625509848500).

Almost surely, 2^{21002012210022} is an apocalyptic number.

21002012210022 is an abundant number, since it is smaller than the sum of its proper divisors (21006145365978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002012210022 is a wasteful number, since it uses less digits than its factorization.

21002012210022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344429667.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21002012210022 its reverse (22001221020012), we get a palindrome (43003233230034).

The spelling of 21002012210022 in words is "twenty-one trillion, two billion, twelve million, two hundred ten thousand, twenty-two".