21212220112202 has 32 divisors (see below), whose sum is σ = 37634730364800. Its totient is φ = 8773503697728.

The previous prime is 21212220112183. The next prime is 21212220112217. The reversal of 21212220112202 is 20221102221212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10906052 + ... + 12703007.

It is an arithmetic number, because the mean of its divisors is an integer number (1176085323900).

Almost surely, 2^{21212220112202} is an apocalyptic number.

21212220112202 is a deficient number, since it is larger than the sum of its proper divisors (16422510252598).

21212220112202 is a wasteful number, since it uses less digits than its factorization.

21212220112202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23611310.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21212220112202 its reverse (20221102221212), we get a palindrome (41433322333414).

The spelling of 21212220112202 in words is "twenty-one trillion, two hundred twelve billion, two hundred twenty million, one hundred twelve thousand, two hundred two".