12122121222200 has 96 divisors (see below), whose sum is σ = 31050524938320. Its totient is φ = 4364400000000.

The previous prime is 12122121222173. The next prime is 12122121222203. The reversal of 12122121222200 is 222212122121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122121222203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27055301 + ... + 27499700.

Almost surely, 2^{12122121222200} is an apocalyptic number.

12122121222200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122121222200 is an abundant number, since it is smaller than the sum of its proper divisors (18928403716120).

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

12122121222200 is a wasteful number, since it uses less digits than its factorization.

12122121222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54555129 (or 54555120 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12122121222200 its reverse (222212122121), we get a palindrome (12344333344321).

It can be divided in two parts, 12122121 and 222200, that added together give a palindrome (12344321).

The spelling of 12122121222200 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred".