21122011021222 has 12 divisors (see below), whose sum is σ = 31886104626540. Its totient is φ = 10493737935096.

The previous prime is 21122011021207. The next prime is 21122011021253. The reversal of 21122011021222 is 22212011022112.

It is a super-2 number, since 2×21122011021222² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21122011021222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214178572 + ... + 214277167.

It is an arithmetic number, because the mean of its divisors is an integer number (2657175385545).

Almost surely, 2^{21122011021222} is an apocalyptic number.

21122011021222 is a deficient number, since it is larger than the sum of its proper divisors (10764093605318).

21122011021222 is an equidigital number, since it uses as much as digits as its factorization.

21122011021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428456055 (or 428455898 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21122011021222 its reverse (22212011022112), we get a palindrome (43334022043334).

The spelling of 21122011021222 in words is "twenty-one trillion, one hundred twenty-two billion, eleven million, twenty-one thousand, two hundred twenty-two".