21220122220211 has 8 divisors (see below), whose sum is σ = 21362713058064. Its totient is φ = 21077682675840.

The previous prime is 21220122220153. The next prime is 21220122220237. The reversal of 21220122220211 is 11202222102212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21220122220211 - 2³⁰ = 21219048478387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220122220411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37541906 + ... + 38102951.

It is an arithmetic number, because the mean of its divisors is an integer number (2670339132258).

Almost surely, 2^{21220122220211} is an apocalyptic number.

21220122220211 is a deficient number, since it is larger than the sum of its proper divisors (142590837853).

21220122220211 is a wasteful number, since it uses less digits than its factorization.

21220122220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75646741.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21220122220211 its reverse (11202222102212), we get a palindrome (32422344322423).

The spelling of 21220122220211 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, two hundred twenty thousand, two hundred eleven".