212102200101221 has 12 divisors (see below), whose sum is σ = 215638256822976. Its totient is φ = 208623208839120.

The previous prime is 212102200101179. The next prime is 212102200101227. The reversal of 212102200101221 is 122101002201212.

It is not a de Polignac number, because 212102200101221 - 2⁴² = 207704153590117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212102200101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102200101227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 582031556 + ... + 582395858.

It is an arithmetic number, because the mean of its divisors is an integer number (17969854735248).

Almost surely, 2^{212102200101221} is an apocalyptic number.

It is an amenable number.

212102200101221 is a deficient number, since it is larger than the sum of its proper divisors (3536056721755).

212102200101221 is an equidigital number, since it uses as much as digits as its factorization.

212102200101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520892 (or 520831 counting only the distinct ones).

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

Adding to 212102200101221 its reverse (122101002201212), we get a palindrome (334203202302433).

The spelling of 212102200101221 in words is "two hundred twelve trillion, one hundred two billion, two hundred million, one hundred one thousand, two hundred twenty-one".