212221022311 has 4 divisors (see below), whose sum is σ = 212226163312. Its totient is φ = 212215881312.

The previous prime is 212221022297. The next prime is 212221022317. The reversal of 212221022311 is 113220122212.

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

It is a cyclic number.

It is not a de Polignac number, because 212221022311 - 2¹⁹ = 212220498023 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 (212221022317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2508075 + ... + 2591308.

It is an arithmetic number, because the mean of its divisors is an integer number (53056540828).

Almost surely, 2^212221022311 is an apocalyptic number.

212221022311 is a deficient number, since it is larger than the sum of its proper divisors (5141001).

212221022311 is an equidigital number, since it uses as much as digits as its factorization.

212221022311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5141000.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212221022311 its reverse (113220122212), we get a palindrome (325441144523).

Subtracting from 212221022311 its reverse (113220122212), we obtain a palindrome (99000900099).

The spelling of 212221022311 in words is "two hundred twelve billion, two hundred twenty-one million, twenty-two thousand, three hundred eleven".