21122121012222 has 8 divisors (see below), whose sum is σ = 42244242024456. Its totient is φ = 7040707004072.

The previous prime is 21122121012203. The next prime is 21122121012233. The reversal of 21122121012222 is 22221012122112.

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

21122121012222 is an admirable number.

It is a super-2 number, since 2×21122121012222² (a number of 27 digits) contains 22 as substring.

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, 1760176751013 + ... + 1760176751024.

It is an arithmetic number, because the mean of its divisors is an integer number (5280530253057).

Almost surely, 2^{21122121012222} is an apocalyptic number.

21122121012222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122121012222 is a wasteful number, since it uses less digits than its factorization.

21122121012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520353502042.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21122121012222 its reverse (22221012122112), we get a palindrome (43343133134334).

The spelling of 21122121012222 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty-one million, twelve thousand, two hundred twenty-two".