21220101212211 has 36 divisors (see below), whose sum is σ = 33933433326520. Its totient is φ = 12768144523200.

The previous prime is 21220101212173. The next prime is 21220101212213. The reversal of 21220101212211 is 11221210102212.

21220101212211 is a `hidden beast` number, since 21 + 220 + 1 + 0 + 1 + 212 + 211 = 666.

It is not a de Polignac number, because 21220101212211 - 2³⁰ = 21219027470387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220101212213) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 69941650 + ... + 70244391.

Almost surely, 2^{21220101212211} is an apocalyptic number.

21220101212211 is a deficient number, since it is larger than the sum of its proper divisors (12713332114309).

21220101212211 is a wasteful number, since it uses less digits than its factorization.

21220101212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140186208 (or 140186194 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21220101212211 its reverse (11221210102212), we get a palindrome (32441311314423).

The spelling of 21220101212211 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, two hundred twelve thousand, two hundred eleven".