1211302212200 has 96 divisors (see below), whose sum is σ = 2914344943200. Its totient is φ = 467660040960.

The previous prime is 1211302212193. The next prime is 1211302212203. The reversal of 1211302212200 is 22122031121.

It is a super-2 number, since 2×1211302212200² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211302212203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18544799 + ... + 18610001.

It is an arithmetic number, because the mean of its divisors is an integer number (30357759825).

Almost surely, 2^{1211302212200} is an apocalyptic number.

1211302212200 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 1211302212200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1457172471600).

1211302212200 is an abundant number, since it is smaller than the sum of its proper divisors (1703042731000).

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

1211302212200 is a wasteful number, since it uses less digits than its factorization.

1211302212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68451 (or 68442 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1211302212200 its reverse (22122031121), we get a palindrome (1233424243321).

The spelling of 1211302212200 in words is "one trillion, two hundred eleven billion, three hundred two million, two hundred twelve thousand, two hundred".