212210211022221 has 8 divisors (see below), whose sum is σ = 283182540830464. Its totient is φ = 141355677614400.

The previous prime is 212210211022189. The next prime is 212210211022223. The reversal of 212210211022221 is 122220112012212.

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

It is not a de Polignac number, because 212210211022221 - 2⁵ = 212210211022189 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 (212210211022223) 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, 29449095901 + ... + 29449103106.

It is an arithmetic number, because the mean of its divisors is an integer number (35397817603808).

Almost surely, 2^{212210211022221} is an apocalyptic number.

It is an amenable number.

212210211022221 is a deficient number, since it is larger than the sum of its proper divisors (70972329808243).

212210211022221 is a wasteful number, since it uses less digits than its factorization.

212210211022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58898200211.

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

Adding to 212210211022221 its reverse (122220112012212), we get a palindrome (334430323034433).

The spelling of 212210211022221 in words is "two hundred twelve trillion, two hundred ten billion, two hundred eleven million, twenty-two thousand, two hundred twenty-one".