211012211022221 has 32 divisors (see below), whose sum is σ = 251212582241280. Its totient is φ = 173483724750336.

The previous prime is 211012211022191. The next prime is 211012211022313. The reversal of 211012211022221 is 122220112210112.

It is not a de Polignac number, because 211012211022221 - 2³⁸ = 210737333115277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211012211022193 and 211012211022202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211012211027221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10544285 + ... + 23091261.

It is an arithmetic number, because the mean of its divisors is an integer number (7850393195040).

Almost surely, 2^{211012211022221} is an apocalyptic number.

It is an amenable number.

211012211022221 is a deficient number, since it is larger than the sum of its proper divisors (40200371219059).

211012211022221 is a wasteful number, since it uses less digits than its factorization.

211012211022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12548033.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211012211022221 its reverse (122220112210112), we get a palindrome (333232323232333).

The spelling of 211012211022221 in words is "two hundred eleven trillion, twelve billion, two hundred eleven million, twenty-two thousand, two hundred twenty-one".