21221120002022 has 16 divisors (see below), whose sum is σ = 33583357420800. Its totient is φ = 10029211723080.

The previous prime is 21221120001989. The next prime is 21221120002109. The reversal of 21221120002022 is 22020002112212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636031754 + ... + 636065117.

It is an arithmetic number, because the mean of its divisors is an integer number (2098959838800).

Almost surely, 2^{21221120002022} is an apocalyptic number.

21221120002022 is a deficient number, since it is larger than the sum of its proper divisors (12362237418778).

21221120002022 is a wasteful number, since it uses less digits than its factorization.

21221120002022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272097331.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21221120002022 its reverse (22020002112212), we get a palindrome (43241122114234).

The spelling of 21221120002022 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twenty million, two thousand, twenty-two".