20121122222200 has 24 divisors (see below), whose sum is σ = 46781609167080. Its totient is φ = 8048448888800.

The previous prime is 20121122222191. The next prime is 20121122222221. The reversal of 20121122222200 is 222222112102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50302805356 + ... + 50302805755.

It is an arithmetic number, because the mean of its divisors is an integer number (1949233715295).

Almost surely, 2^{20121122222200} is an apocalyptic number.

20121122222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121122222200 is an abundant number, since it is smaller than the sum of its proper divisors (26660486944880).

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

20121122222200 is a wasteful number, since it uses less digits than its factorization.

20121122222200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100605611127 (or 100605611118 counting only the distinct ones).

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

Adding to 20121122222200 its reverse (222222112102), we get a palindrome (20343344334302).

The spelling of 20121122222200 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred".