21021022120222 has 8 divisors (see below), whose sum is σ = 31563610022736. Its totient is φ = 10499818779312.

The previous prime is 21021022120211. The next prime is 21021022120229. The reversal of 21021022120222 is 22202122012012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21021022120222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021022120229) by changing a digit.

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, 5346137943 + ... + 5346141874.

It is an arithmetic number, because the mean of its divisors is an integer number (3945451252842).

Almost surely, 2^{21021022120222} is an apocalyptic number.

21021022120222 is a deficient number, since it is larger than the sum of its proper divisors (10542587902514).

21021022120222 is a wasteful number, since it uses less digits than its factorization.

21021022120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10692280802.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21021022120222 its reverse (22202122012012), we get a palindrome (43223144132234).

The spelling of 21021022120222 in words is "twenty-one trillion, twenty-one billion, twenty-two million, one hundred twenty thousand, two hundred twenty-two".