21220211221022 has 32 divisors (see below), whose sum is σ = 35999473676544. Its totient is φ = 9296916164800.

The previous prime is 21220211220997. The next prime is 21220211221031. The reversal of 21220211221022 is 22012211202212.

It is a junction number, because it is equal to n+sod(n) for n = 21220211220985 and 21220211221003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141646418 + ... + 141796149.

It is an arithmetic number, because the mean of its divisors is an integer number (1124983552392).

Almost surely, 2^{21220211221022} is an apocalyptic number.

21220211221022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21220211221022 is a deficient number, since it is larger than the sum of its proper divisors (14779262455522).

21220211221022 is a wasteful number, since it uses less digits than its factorization.

21220211221022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283442704.

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

Adding to 21220211221022 its reverse (22012211202212), we get a palindrome (43232422423234).

The spelling of 21220211221022 in words is "twenty-one trillion, two hundred twenty billion, two hundred eleven million, two hundred twenty-one thousand, twenty-two".