212220121022211 has 4 divisors (see below), whose sum is σ = 282960161362952. Its totient is φ = 141480080681472.

The previous prime is 212220121022141. The next prime is 212220121022269. The reversal of 212220121022211 is 112220121022212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 212220121022211 - 2⁷ = 212220121022083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212220121022411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35370020170366 + ... + 35370020170371.

It is an arithmetic number, because the mean of its divisors is an integer number (70740040340738).

Almost surely, 2^{212220121022211} is an apocalyptic number.

212220121022211 is a deficient number, since it is larger than the sum of its proper divisors (70740040340741).

212220121022211 is an equidigital number, since it uses as much as digits as its factorization.

212220121022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70740040340740.

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

Adding to 212220121022211 its reverse (112220121022212), we get a palindrome (324440242044423).

Subtracting from 212220121022211 its reverse (112220121022212), we obtain a palindrome (99999999999999).

The spelling of 212220121022211 in words is "two hundred twelve trillion, two hundred twenty billion, one hundred twenty-one million, twenty-two thousand, two hundred eleven".