212001002221 has 8 divisors (see below), whose sum is σ = 215732940320. Its totient is φ = 208285762608.

The previous prime is 212001002219. The next prime is 212001002231. The reversal of 212001002221 is 122200100212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 212001002221 - 2¹ = 212001002219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001002231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4149006 + ... + 4199791.

It is an arithmetic number, because the mean of its divisors is an integer number (26966617540).

Almost surely, 2^212001002221 is an apocalyptic number.

It is an amenable number.

212001002221 is a deficient number, since it is larger than the sum of its proper divisors (3731938099).

212001002221 is an equidigital number, since it uses as much as digits as its factorization.

212001002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8349243.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212001002221 its reverse (122200100212), we get a palindrome (334201102433).

The spelling of 212001002221 in words is "two hundred twelve billion, one million, two thousand, two hundred twenty-one".