21222001210208 has 12 divisors (see below), whose sum is σ = 41780814882660. Its totient is φ = 10611000605088.

The previous prime is 21222001210199. The next prime is 21222001210217. The reversal of 21222001210208 is 80201210022212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21222001210199) and next prime (21222001210217).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 331593768878 + ... + 331593768941.

It is an arithmetic number, because the mean of its divisors is an integer number (3481734573555).

Almost surely, 2^{21222001210208} is an apocalyptic number.

It is an amenable number.

21222001210208 is a deficient number, since it is larger than the sum of its proper divisors (20558813672452).

21222001210208 is an equidigital number, since it uses as much as digits as its factorization.

21222001210208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663187537829 (or 663187537821 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The spelling of 21222001210208 in words is "twenty-one trillion, two hundred twenty-two billion, one million, two hundred ten thousand, two hundred eight".