21000220120222 has 8 divisors (see below), whose sum is σ = 36000377348976. Its totient is φ = 9000094337232.

The previous prime is 21000220120153. The next prime is 21000220120247. The reversal of 21000220120222 is 22202102200012.

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

It is a junction number, because it is equal to n+sod(n) for n = 21000220120196 and 21000220120205.

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 3 ways as a sum of consecutive naturals, for example, 750007861423 + ... + 750007861450.

It is an arithmetic number, because the mean of its divisors is an integer number (4500047168622).

Almost surely, 2^{21000220120222} is an apocalyptic number.

21000220120222 is a deficient number, since it is larger than the sum of its proper divisors (15000157228754).

21000220120222 is a wasteful number, since it uses less digits than its factorization.

21000220120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500015722882.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21000220120222 its reverse (22202102200012), we get a palindrome (43202322320234).

The spelling of 21000220120222 in words is "twenty-one trillion, two hundred twenty million, one hundred twenty thousand, two hundred twenty-two".