212211210202221 has 8 divisors (see below), whose sum is σ = 287744013833760. Its totient is φ = 139076273352752.

The previous prime is 212211210202171. The next prime is 212211210202289. The reversal of 212211210202221 is 122202012112212.

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 212211210202221 - 2³⁰ = 212210136460397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211210242221) 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, 599466695310 + ... + 599466695663.

It is an arithmetic number, because the mean of its divisors is an integer number (35968001729220).

Almost surely, 2^{212211210202221} is an apocalyptic number.

It is an amenable number.

212211210202221 is a deficient number, since it is larger than the sum of its proper divisors (75532803631539).

212211210202221 is a wasteful number, since it uses less digits than its factorization.

212211210202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198933391035.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 212211210202221 its reverse (122202012112212), we get a palindrome (334413222314433).

The spelling of 212211210202221 in words is "two hundred twelve trillion, two hundred eleven billion, two hundred ten million, two hundred two thousand, two hundred twenty-one".