21202220012211 has 192 divisors, whose sum is σ = 39247923326976. Its totient is φ = 10752279552000.

The previous prime is 21202220012173. The next prime is 21202220012213. The reversal of 21202220012211 is 11221002220212.

It is a happy number.

21202220012211 is a `hidden beast` number, since 21 + 202 + 220 + 0 + 1 + 221 + 1 = 666.

It is not a de Polignac number, because 21202220012211 - 2¹⁰ = 21202220011187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21202220012213) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 245287546 + ... + 245373968.

It is an arithmetic number, because the mean of its divisors is an integer number (204416267328).

Almost surely, 2^{21202220012211} is an apocalyptic number.

21202220012211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21202220012211 is a deficient number, since it is larger than the sum of its proper divisors (18045703314765).

21202220012211 is a wasteful number, since it uses less digits than its factorization.

21202220012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86682 (or 86679 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21202220012211 its reverse (11221002220212), we get a palindrome (32423222232423).

The spelling of 21202220012211 in words is "twenty-one trillion, two hundred two billion, two hundred twenty million, twelve thousand, two hundred eleven".