22121000122012 has 24 divisors (see below), whose sum is σ = 42231611666160. Its totient is φ = 10054854476160.

The previous prime is 22121000121989. The next prime is 22121000122027. The reversal of 22121000122012 is 21022100012122.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 536187 + ... + 6673042.

It is an arithmetic number, because the mean of its divisors is an integer number (1759650486090).

Almost surely, 2^{22121000122012} is an apocalyptic number.

22121000122012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22121000122012 is a deficient number, since it is larger than the sum of its proper divisors (20110611544148).

22121000122012 is a wasteful number, since it uses less digits than its factorization.

22121000122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7278981 (or 7278979 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22121000122012 its reverse (21022100012122), we get a palindrome (43143100134134).

The spelling of 22121000122012 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred twenty-two thousand, twelve".