212102002221 has 8 divisors (see below), whose sum is σ = 285445685664. Its totient is φ = 140079826800.

The previous prime is 212102002199. The next prime is 212102002249. The reversal of 212102002221 is 122200201212.

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

It is not a de Polignac number, because 212102002221 - 2³¹ = 209954518573 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212102002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102002121) 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, 330376630 + ... + 330377271.

It is an arithmetic number, because the mean of its divisors is an integer number (35680710708).

Almost surely, 2^212102002221 is an apocalyptic number.

It is an amenable number.

212102002221 is a deficient number, since it is larger than the sum of its proper divisors (73343683443).

212102002221 is a wasteful number, since it uses less digits than its factorization.

212102002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660754011.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212102002221 its reverse (122200201212), we get a palindrome (334302203433).

The spelling of 212102002221 in words is "two hundred twelve billion, one hundred two million, two thousand, two hundred twenty-one".