212221221011 has 4 divisors (see below), whose sum is σ = 214168204800. Its totient is φ = 210274237224.

The previous prime is 212221220971. The next prime is 212221221013. The reversal of 212221221011 is 110122122212.

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 212221221011 - 2³⁰ = 211147479187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212221221013) 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, 973491731 + ... + 973491948.

It is an arithmetic number, because the mean of its divisors is an integer number (53542051200).

Almost surely, 2^212221221011 is an apocalyptic number.

212221221011 is a deficient number, since it is larger than the sum of its proper divisors (1946983789).

212221221011 is a wasteful number, since it uses less digits than its factorization.

212221221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946983788.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212221221011 its reverse (110122122212), we get a palindrome (322343343223).

The spelling of 212221221011 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, eleven".