20121000000222 has 16 divisors (see below), whose sum is σ = 43900363636992. Its totient is φ = 6097272727320.

The previous prime is 20121000000203. The next prime is 20121000000239. The reversal of 20121000000222 is 22200000012102.

It is a junction number, because it is equal to n+sod(n) for n = 20121000000198 and 20121000000207.

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, 152431818118 + ... + 152431818249.

It is an arithmetic number, because the mean of its divisors is an integer number (2743772727312).

Almost surely, 2^{20121000000222} is an apocalyptic number.

20121000000222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20121000000222 is an abundant number, since it is smaller than the sum of its proper divisors (23779363636770).

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

20121000000222 is a wasteful number, since it uses less digits than its factorization.

20121000000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304863636383.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20121000000222 its reverse (22200000012102), we get a palindrome (42321000012324).

The spelling of 20121000000222 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty-two", and thus it is an aban number.