21212220011102 has 8 divisors (see below), whose sum is σ = 31818562065576. Its totient is φ = 10606032655912.

The previous prime is 21212220011089. The next prime is 21212220011123. The reversal of 21212220011102 is 20111002221212.

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

It is a super-2 number, since 2×21212220011102² (a number of 27 digits) contains 22 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, 38331413 + ... + 38880864.

It is an arithmetic number, because the mean of its divisors is an integer number (3977320258197).

Almost surely, 2^{21212220011102} is an apocalyptic number.

21212220011102 is a deficient number, since it is larger than the sum of its proper divisors (10606342054474).

21212220011102 is a wasteful number, since it uses less digits than its factorization.

21212220011102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77349642.

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

Adding to 21212220011102 its reverse (20111002221212), we get a palindrome (41323222232314).

The spelling of 21212220011102 in words is "twenty-one trillion, two hundred twelve billion, two hundred twenty million, eleven thousand, one hundred two".