1212211122200 has 192 divisors, whose sum is σ = 3353460989760. Its totient is φ = 402941214720.

The previous prime is 1212211122193. The next prime is 1212211122257. The reversal of 1212211122200 is 22211122121.

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, 420392 + ... + 1612808.

It is an arithmetic number, because the mean of its divisors is an integer number (17465942655).

Almost surely, 2^{1212211122200} is an apocalyptic number.

1212211122200 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 1212211122200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1676730494880).

1212211122200 is an abundant number, since it is smaller than the sum of its proper divisors (2141249867560).

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

1212211122200 is a wasteful number, since it uses less digits than its factorization.

1212211122200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192486 (or 1192477 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212211122200 its reverse (22211122121), we get a palindrome (1234422244321).

It can be divided in two parts, 121221 and 1122200, that added together give a palindrome (1243421).

The spelling of 1212211122200 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred twenty-two thousand, two hundred".