212221121011 has 4 divisors (see below), whose sum is σ = 212223421872. Its totient is φ = 212218820152.

The previous prime is 212221120913. The next prime is 212221121029. The reversal of 212221121011 is 110121122212.

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 212221121011 - 2³¹ = 210073637363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212221121051) 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, 1006036 + ... + 1198561.

It is an arithmetic number, because the mean of its divisors is an integer number (53055855468).

Almost surely, 2^212221121011 is an apocalyptic number.

212221121011 is a deficient number, since it is larger than the sum of its proper divisors (2300861).

212221121011 is an equidigital number, since it uses as much as digits as its factorization.

212221121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300860.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212221121011 its reverse (110121122212), we get a palindrome (322342243223).

The spelling of 212221121011 in words is "two hundred twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, eleven".