21212102020022 has 8 divisors (see below), whose sum is σ = 32266296030672. Its totient is φ = 10456670009800.

The previous prime is 21212102019989. The next prime is 21212102020079. The reversal of 21212102020022 is 22002020121212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×21212102020022³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74690499929 + ... + 74690500212.

It is an arithmetic number, because the mean of its divisors is an integer number (4033287003834).

Almost surely, 2^{21212102020022} is an apocalyptic number.

21212102020022 is a deficient number, since it is larger than the sum of its proper divisors (11054194010650).

21212102020022 is a wasteful number, since it uses less digits than its factorization.

21212102020022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149381000214.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21212102020022 its reverse (22002020121212), we get a palindrome (43214122141234).

The spelling of 21212102020022 in words is "twenty-one trillion, two hundred twelve billion, one hundred two million, twenty thousand, twenty-two".