21220010011222 has 64 divisors (see below), whose sum is σ = 35204663216448. Its totient is φ = 9512616960000.

The previous prime is 21220010011181. The next prime is 21220010011247. The reversal of 21220010011222 is 22211001002212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21220010011196 and 21220010011205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2870280358 + ... + 2870287750.

It is an arithmetic number, because the mean of its divisors is an integer number (550072862757).

Almost surely, 2^{21220010011222} is an apocalyptic number.

21220010011222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21220010011222 is a deficient number, since it is larger than the sum of its proper divisors (13984653205226).

21220010011222 is a wasteful number, since it uses less digits than its factorization.

21220010011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12385.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21220010011222 its reverse (22211001002212), we get a palindrome (43431011013434).

The spelling of 21220010011222 in words is "twenty-one trillion, two hundred twenty billion, ten million, eleven thousand, two hundred twenty-two".