1212012222200 has 192 divisors, whose sum is σ = 3214813613760. Its totient is φ = 420976926720.

The previous prime is 1212012222193. The next prime is 1212012222299. The reversal of 1212012222200 is 22222102121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107090942 + ... + 107102258.

It is an arithmetic number, because the mean of its divisors is an integer number (16743820905).

Almost surely, 2^{1212012222200} is an apocalyptic number.

1212012222200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212012222200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1607406806880).

1212012222200 is an abundant number, since it is smaller than the sum of its proper divisors (2002801391560).

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

1212012222200 is a wasteful number, since it uses less digits than its factorization.

1212012222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13786 (or 13777 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1212012222200 its reverse (22222102121), we get a palindrome (1234234324321).

The spelling of 1212012222200 in words is "one trillion, two hundred twelve billion, twelve million, two hundred twenty-two thousand, two hundred".